A cashier counts Yemeni riyal banknotes at a local currency exchange in Aden, Yemen June 29, 2021. Picture taken June 29, 2021. REUTERS/Fawaz Salman

A cashier waits for takeout orders next to stacked tables and chairs at a restaurant as dining-in is restricted to curb the coronavirus disease (COVID-19) outbreak in Singapore May 17, 2021. REUTERS/Edgar Su

A cashier recieves a payment via a cryptocurrency app at a kebab restaurant that accepts Bitcoin and Dexchain in Istanbul, Turkey, April 27, 2021. Picture taken April 27, 2021. REUTERS/Umit Bektas

A cashier checks a cryptocurrency app at a kebab restaurant that accepts payment with Bitcoin and Dexchain in Istanbul, Turkey, April 27, 2021. Picture taken April 27, 2021. REUTERS/Umit Bektas

FILE PHOTO: A cashier wearing a mask to help slow the spread of coronavirus disease (COVID-19) bags groceries as the territory of Nunavut enters a two week mandatory restriction period in Iqaluit, Nunavut, Canada November 18, 2020. REUTERS/Natalie Maerzluft/File Photo

A cashier of German food discounter ALDI Nord is seen behind COVID-19 protection glass at ALDI's very first store during the coronavirus disease (COVID-19) pandemic in Essen Germany, March 5, 2021. REUTERS/Wolfgang Rattay

A cashier works at Alza showroom amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, February 19, 2021. Picture taken February 19, 2021. REUTERS/David W Cerny

A cashier works at Alza showroom amid the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, February 19, 2021. Picture taken February 19, 2021. REUTERS/David W Cerny

People wearing face masks pay for items at a cashier inside a supermarket, amid concerns about the spread of the coronavirus disease (COVID-19), in Beirut, Lebanon, January 11, 2021. REUTERS/Mohamed Azakir

People wearing face masks pay for items at a cashier inside a supermarket, amid concerns about the spread of the coronavirus disease (COVID-19), in Beirut, Lebanon, January 11, 2021. REUTERS/Mohamed Azakir

A cashier waits for customers inside of a re-opened shop, as restrictions ease following the coronavirus disease (COVID-19) outbreak in Prague, Czech Republic, December 3, 2020. REUTERS/David W Cerny

A demonstrator lies on a cashier counter as they block the operations of a Carrefour supermarket during a protest against racism, after Joao Alberto Silveira Freitas was beaten to death by security guards at a Carrefour supermarket in Porto Alegre, in Rio de Janeiro, Brazil, November 20, 2020. REUTERS/Ricardo Moraes

A demonstrator stands next to Black Panther action figures used to block a cashier counter of a Carrefour supermarket during a protest against racism, after Joao Alberto Silveira Freitas was beaten to death by security guards at a Carrefour supermarket in Porto Alegre, in Rio de Janeiro, Brazil, November 20, 2020. REUTERS/Ricardo Moraes

A demonstrator lies on a cashier counter as other fill it with products to block the operations of a Carrefour supermarket during a protest against racism, after Joao Alberto Silveira Freitas was beaten to death by security guards at a Carrefour supermarket in Porto Alegre, in Rio de Janeiro, Brazil, November 20, 2020. REUTERS/Ricardo Moraes

A demonstrator lies on a cashier counter as they block the operations of a Carrefour supermarket during a protest against racism, after Joao Alberto Silveira Freitas was beaten to death by security guards at a Carrefour supermarket in Porto Alegre, in Rio de Janeiro, Brazil, November 20, 2020. REUTERS/Ricardo Moraes

A cashier wearing a mask to help slow the spread of coronavirus disease (COVID-19) bags groceries as the territory of Nunavut enters a two week mandatory restriction period in Iqaluit, Nunavut, Canada November 18, 2020. REUTERS/Natalie Maerzluft

A cashier at a grocery store wears a mask to help slow the spread of coronavirus disease (COVID-19) as the territory of Nunavut enters a two week mandatory restriction period in Iqaluit, Nunavut, Canada November 18, 2020. REUTERS/Natalie Maerzluft

A Palestinian customer wearing a protective face mask pays for items at a cashier in a mall that reopened partially amid the coronavirus disease (COVID-19) crisis, in Gaza City September 20, 2020. Picture taken September 20, 2020. REUTERS/Mohammed Salem

A Palestinian customer wearing a protective face mask pays for items at a cashier in a mall that reopened partially amid the coronavirus disease (COVID-19) crisis, in Gaza City September 20, 2020. REUTERS/Mohammed Salem

A woman organises goods at the cashier of a supermarket, ahead of the Jewish New Year holiday and the upcoming tighter restriction to prevent the spread of the coronavirus disease (COVID-19) in Ashdod, Israel September 16, 2020. REUTERS/Amir Cohen

The cashier holds plant-based meatballs produced by Zhenmeat, as customers pay for their meal during lunch time at a Hope Tree restaurant in Beijing, China September 4, 2020. Picture taken September 4, 2020. REUTERS/Carlos Garcia Rawlins

The cashier holds plant-based meatballs produced by Zhenmeat, as customers pay for their meal during lunch time at a Hope Tree restaurant in Beijing, China September 4, 2020. Picture taken September 4, 2020. REUTERS/Carlos Garcia Rawlins

A cashier checks a man out of grocer store in the Manhattan borough of New York City, New York, U.S., August 7, 2020. REUTERS/Carlo Allegri

A Saudi woman works as a cashier at a coffee shop at Abha High City, as the summer season kicks off with health precautions amid the coronavirus disease (COVID-19) outbreak, in an effort to boost internal tourism after the pandemic in Abha, Saudi Arabia July 18, 2020. Picture taken July 18, 2020. REUTERS/Ahmed Yosri

A cashier, working behind a protective plexiglass shield, rings up a customer at a Coles supermarket following the easing of restrictions implemented to curb the spread of the coronavirus disease (COVID-19) in Sydney, Australia, June 17, 2020. REUTERS/Loren Elliott

A cashier works behind a protective plexiglass shield at a Coles supermarket following the easing of restrictions implemented to curb the spread of the coronavirus disease (COVID-19) in Sydney, Australia, June 17, 2020. REUTERS/Loren Elliott

People are seen at the Atjeh Connection restaurant with separation on the cashier table as the government eases restrictions amid the coronavirus disease (COVID-19) outbreak in Jakarta, Indonesia June 8, 2020. REUTERS/Ajeng Dinar Ulfiana

People are seen at the Atjeh Connection restaurant with separation on the cashier table as the government eases restrictions amid the coronavirus disease (COVID-19) outbreak in Jakarta, Indonesia June 8, 2020. REUTERS/Ajeng Dinar Ulfiana

A cashier wears both a face mask and gloves as she interacts with customers at a cafe which reopened to the public for the first time since the start of the coronavirus disease (COVID-19) restrictions in Amman, Jordan June 6, 2020. REUTERS/Muhammad Hamed

A customer wearing a protective face mask pays for items at a cashier lined with a makeshift plastic barrier to prevent the spread of the coronavirus disease (COVID-19), in a shopping mall in Mandaluyong City, Metro Manila, Philippines June 3, 2020. REUTERS/Eloisa Lopez

A cashier woman wears a face shield behind plastic protection as she works in a supermarket amid the coronavirus disease (COVID-19) outbreak after the Thai government eased isolation measures, in Bangkok, Thailand, May 29 2020. REUTERS/Jorge Silva

A cashier woman wears a face shield behind plastic protection as she works in a supermarket amid the coronavirus disease (COVID-19) outbreak after the Thai government eased isolation measures, in Bangkok, Thailand, May 29 2020. REUTERS/Jorge Silva

Plexiglass sheets help protect cashiers during the coronavirus disease (COVID-19) outbreak at the Tiger Market in Oxon Hill, Maryland, U.S. May 20, 2020. REUTERS/Jonathan Ernst

Cashiers in protective suits work in an exchange office at Grand Bazaar, which has been closed since March 23 and will re-open completely on June 1, amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey, May 8, 2020. REUTERS/Umit Bektas

Cashiers in protective suits work in an exchange office at Grand Bazaar, which has been closed since March 23 and will re-open completely on June 1, amid the spread of the coronavirus disease (COVID-19), in Istanbul, Turkey, May 8, 2020. REUTERS/Umit Bektas

A cashier holds a protective face mask on sale as she serves a customer at a Carrefour market in Cannes during the outbreak of the coronavirus disease (COVID-19) in France, May 4, 2020. REUTERS/Eric Gaillard

A cashier wearing a protective face mask holds a protective face mask on sale as she serves a customer at a Carrefour market in Cannes during the outbreak of the coronavirus disease (COVID-19) in France, May 4, 2020. REUTERS/Eric Gaillard

Hairdresser Barbara Hoppe installs a plexiglass screens that separates the cashier from the customer, in preparation for the reopening of her shop next week, as the spread of coronavirus disease (COVID-19) continues in Bonn, Germany, April 30, 2020. REUTERS/Wolfgang Rattay

Cashier Kerstin Strasen smiles as she sits at a register in a supermarket where German Minister for Family Affairs, Senior Citizens, Women and Youth, Franziska Giffey promoted the nationwide cooperation of supermarkets against domestic viloence, in Berlin, Germany, April 29, 2020. Michael Sohn/Pool via REUTERS

Cashier Kerstin Strasen smiles as she sits at a register in a supermarket where German Minister for Family Affairs, Senior Citizens, Women and Youth, Franziska Giffey promoted the nationwide cooperation of supermarkets against domestic viloence, in Berlin, Germany, April 29, 2020. Michael Sohn/Pool via REUTERS

German Minister for Family Affairs, Senior Citizens, Women and Youth Franziska Giffey who started the nationwide cooperation of supermarkets against domestic violence stands beside the register of cashier Kerstin Strasen in a supermarket, in Berlin, Germany, April 29, 2020. Michael Sohn/Pool via REUTERS

German Minister for Family Affairs, Senior Citizens, Women and Youth Franziska Giffey attaches a sticker at the register of cashier Kerstin Strasen in a supermarket, as part of the nationwide cooperation of supermarkets against domestic violence in Berlin, Germany, April 29, 2020. Michael Sohn/Pool via REUTERS

German Minister for Family Affairs, Senior Citizens, Women and Youth Franziska Giffey attaches a sticker at the register of cashier Kerstin Strasen in a supermarket, as part of the nationwide cooperation of supermarkets against domestic violence in Berlin, Germany, April 29, 2020. Michael Sohn/Pool via REUTERS

A cashier with a protective mask is seen at an Edeka grocery store, as the spread of coronavirus disease (COVID-19) continues in Duesseldorf, Germany, April 29, 2020. REUTERS/Wolfgang Rattay

A cashier with a protective mask is seen at an Edeka grocery store, as the spread of coronavirus disease (COVID-19) continues in Duesseldorf, Germany, April 29, 2020. REUTERS/Wolfgang Rattay

A cashier with a protective mask is seen at an Edeka grocery store, as the spread of coronavirus disease (COVID-19) continues in Duesseldorf, Germany, April 29, 2020. REUTERS/Wolfgang Rattay

A cashier of the food discounter ALDI serves a customer, as the spread of the coronavirus disease (COVID-19) continues in Duesseldorf, Germany, April 29, 2020. REUTERS/Wolfgang Rattay

A cashier of the food discounter ALDI serves a customer, as the spread of the coronavirus disease (COVID-19) continues in Duesseldorf, Germany, April 29, 2020. REUTERS/Wolfgang Rattay

A cashier of the food discounter ALDI serves a customer, as the spread of the coronavirus disease (COVID-19) continues in Duesseldorf, Germany, April 29, 2020. REUTERS/Wolfgang Rattay

A cashier disinfects the checkout counter and the payment terminal in a supermarket, after the federal state of North Rhine-Westphalia decided to make wearing protective masks obligatory in shops and public transportation to fight the spread of the coronavirus disease (COVID-19), in Bad Honnef near Bonn, Germany, April 27, 2020. REUTERS/Wolfgang Rattay

Alberto Rabal, cashier at a Dia&Go supermarket, wears a protective shield and face mask as he tends to customers following the outbreak of the coronavirus disease (COVID-19) in Madrid, Spain, April 25, 2020. REUTERS/Susana Vera

A cashier serves a customer in a shop, as the spread of the coronavirus disease (COVID-19) continues in Erfurt, Germany, April 24, 2020. REUTERS/Karina Hessland

A cashier jokes with French President Emmanuel Macron as he visits a Super U supermarket about the partnership with local producers in Saint-Pol-de-Leon during a day trip centered on agriculture amid the coronavirus disease (COVID-19) outbreak in Brittany, France, April 22, 2020. REUTERS/Stephane Mahe/Pool

A cashier wearing a protective face mask looks at French President Emmanuel Macron (not seen) as he visits a Super U supermarket about the partnership with local producers in Saint-Pol-de-Leon during a day trip centered on agriculture amid the coronavirus disease (COVID-19) outbreak in Brittany, France, April 22, 2020. REUTERS/Stephane Mahe/Pool

French President Emmanuel Macron talks with a cashier wearing a protective face mask as he visits a Super U supermarket about the partnership with local producers in Saint-Pol-de-Leon during a day trip centered on agriculture amid the coronavirus disease (COVID-19) outbreak in Brittany, France, April 22, 2020. REUTERS/Stephane Mahe/Pool

Tallsa Taylor, a cashier and visitor screener, poses for a portrait at the Swedish Medical Center Issaquah campus during the coronavirus disease (COVID-19) outbreak, in Issaquah, Washington, U.S. April 21, 2020. "I have read about big historic moments in the world like World War II, the Great Depression, and 9/11 but I never thought I would experience a historic moment firsthand," she says. REUTERS/David Ryder

A parking cashier wearing protective face mask and gloves holds a ticket at the exit of the parking lot of the Kuwait Airport, following the outbreak of the coronavirus disease (COVID-19), in Kuwait City, Kuwait April 21, 2020. REUTERS/Stephanie McGehee

Cashiers wait for customers at a furniture shop after its re-opening, as the spread of coronavirus disease (COVID-19) continues in Pulheim, Germany, April 20, 2020. REUTERS/Wolfgang Rattay

Artist David "S.I.D." Perez takes a picture of his graffiti of a cashier to pay tribute to essential workers during the coronavirus disease (COVID-19) outbreak in Gland, Switzerland, April 5, 2020. REUTERS/Denis Balibouse

Artist David "S.I.D." Perez paints a graffiti of a cashier to pay tribute to essential workers during the coronavirus disease (COVID-19) outbreak in Gland, Switzerland, April 5, 2020. REUTERS/Denis Balibouse