In my industry, the cost of products changes constantly, so I can not have a fixed sale price, there is a way to manage the sales price based on the average purchase cost

Good day, user46677.

I'd be happy to help you manage the sales price of your products based on the average purchase cost in QuickBooks Online.

If you wish to manage the sale price of your product based on the average purchase cost, you'll need to manually change the price when creating an invoice.

You may find this article helpful:  Set pricing rules.

You can call our dedicated team who will be happy to assist you if you need help with QuickBooks in the future. Our contact details can be found here along with our opening hours:

1. Go to: https://help.quickbooks.intuit.com/en_US/contact.
2. Choose your QuickBooks Product.
3. Select your QuickBooks version.
4. On the Contact Us page, click a topic.
5. Click on the Get Phone Number button to see the support number.

You can always get back to me if you have additional questions about sales price in QBO. Have a good one.