A conflict of price
First and foremost, we wholeheartedly agree with the cashier’s expression. That is the appropriate response to seeing a conveyor belt filled with bananas. Imagine being on the receiving end of a hectic shift or enthusiastically calling over your last client for the day to see this:
The worst aspect is that he can’t just plug it in as 100 identical goods. Sure, he may pile a few bunches on the scale each time, but because it’s done by weight, the process will take longer than simply a few mouse clicks on the computer.