40.32 How should the supermarket exchange money?

The way for supermarkets to find money is to follow the management rules of shopping malls. The supermarket is very big, so it needs to be handled in strict accordance with the management rules of the shopping mall, and the change should also follow the rules. The change of 30.30 yuan needs to be calculated and cannot be rounded. Supermarket generally refers to a store where goods are publicly displayed, customers choose their own goods, queue up for cashier settlement, and mainly deal in fresh food and daily necessities. Self-help shopping, unified cashier settlement retail enterprises.