How to write the invoice for buying zongzi?

1. The first column of the invoice is the name of the purchasing unit, taxpayer identification number, address, telephone number, bank and account number.

2. The second column is the name, unit of measurement, quantity, unit price, amount and tax rate of the commodity or service.

3. The second column is the same as the first column, except that the first column is the purchasing unit and the second column is the sales unit.