What do you do if the cashier gives you less change at the grocery store?

This is an issue that I attach great importance to. In recent years, I have often seen that the smallest denomination is not given when getting change in supermarkets. Because there is no money in the safe. This is a huge mistake. However, if we pay a few cents less, the product will not be delivered. But when it comes to the cashier who gives less, there seems to be no problem.

What do you do if the cashier gives you less change at the grocery store?
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