I like the idea of the game and also the basic mechanics, like calculating the right change. The selecting mechanic was quite hard though. I knew what I wanted to get, but it was difficult to get the right input, which felt a bit frustrating. Maybe you could automatically open the chart? Or even don't use a chart, just have the cashier pull out the items from boxes below the checkstand and automatically give it to the first customer. The two kind of sticks were also hard to differentiate for me. But overall a neat idea!