1. First, enter the information of each product or service in the appropriate column. Make sure that each line corresponds to a product or service. Fill in the product name, price, description and other information, and fill in other information as needed.

2. Secondly, if necessary, you can use the data verification function to limit the input range. For example, setting a price column can only accept digital input and is limited to a certain range.

3. Finally, in the form of calculation, you can use formulas to automatically calculate some values. For example, SUM function can be used to calculate the sum of inventory quantity, and IF function can also be used to judge according to certain conditions.