In which year and country was the world's first self-checkout system implemented in a retail store?

Retail technology has transformed how we shop over the decades. One innovation that dramatically changed the in-store experience was the self-checkout kiosk. These systems reduced wait times, optimized labor allocation, and gave customers more control over their shopping experience. But do you know when and where this retail technology breakthrough first appeared? Test your knowledge of retail innovation history with this question!

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1992 in the United States (Price Chopper supermarket in New York)
1987 in Japan (Itoyokado department store in Tokyo)
1995 in the United Kingdom (Tesco supermarket in London)
2001 in Germany (Metro Group hypermarket in Düsseldorf)