catering TC and AC stand for: transaction times and customer unit price respectively.

1. The number of transactions, TC is the number of orders, and TC in a certain period refers to the number of orders placed in a certain period. The most direct measure of transactions is the number of transactions. The number of transactions is widely used at the micro level, such as various online shop platforms and stores, and the ranking display of single products (only accounting for some weights).

2. Customer unit price, average transaction amount, generally refers to the average unit price, which refers to the average amount of goods purchased by each customer in a shopping mall (supermarket), that is, the average transaction amount. The calculation formula of customer unit price is: customer unit price = sales volume ÷ number of customers clinched, which can be known from the above formula. The sales of stores are determined by the unit price of customers and the number of customers. Therefore, in order to increase the sales of stores, besides attracting as many customers as possible and increasing the number of customer transactions, it is also a very important way to increase the unit price of customers.