This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to calculate commission
Determine what your commission is based on.
Typically, commissions are paid based on the purchase price of goods and services that you sold. However, some companies use different commission bases, like the item's net profit or the item's cost to the company.

OPT:
- For example, some companies are paid different commission levels than other businesses. The higher the commission, the more you may be paid by the seller..
- Figure out if you have the ability to pay commission on goods and services you sold in your shop without haggling. Auction catalogs often require you to come up with multiple commission bases-usually in 1-5 percentages..
- Ask if there are any products or services excluded from the commission plan. A company may pay you a commission for selling certain products and services but not others..
- By considering this question, you can adjust your commission based on the item you sell. For example, you may have purchased a used hot air compressor for $100, but you only purchased that used compressor..
The answer is:
Ask if there are any products or services excluded from the commission plan. A company may pay you a commission for selling certain products and services but not others.