Why does the travel company invoice only show the total amount and not the specific details?

The diagram is convenient and mechanically set. It is illegal to make detailed statements, and the invoice management method is the name, quantity, unit price and amount of the goods, which causes this problem:

1, the merchant map is convenient and the machinery is set.

2. Many staff members don't understand the invoice business. How the first person teaches, how the people behind learn. He only handed in the details, and the people behind him only opened the details.