sales by product/service report

Hello there, . I'm here to ensure the cost of sale issue you've encountered in QuickBooks Online is resolved. 

To start, I'd suggest making sure the income account associated with each item is correct. This could be the cause why the cost of sales didn't reflect in the account. Cost of sales measures and accumulates the total of all costs for a product with inventory type. In this case, you'll have to ensure each product type of the item, so the cost of sales will show up on your report.

The cost column will not show any cost if the cost is not specified in the product details. Click 'Edit' in the Action column and then make sure the Sales Price and Cost fields are not showing zeros.  

Also, I'd recommend running the Sales by Product/Service Detail report to pull up the sales information. From there, you can see see the prices of each sold item and the account associated with it.

Here's how:

1. Go to the Report menu.
2. Type in Sales by Product/Service Detail in the search field, then click to open.
3. Click Customise.
4. On the Report period, select the correct dates.
5. On the Rows/Columns, click on Change columns.
6. Place a checkmark on the Account field.
7. You can on the Filter column to personalize the other details.
8. Once done, click on Run report.

For more details about personalizing reports, please see this article: Customise Reports. 

Additionally, I've added these articles that'll help you manage your products and services in QuickBooks Online:

• Add Stock products in QuickBooks
• Track your Stock in QuickBooks Online
• Use Reports to See your Sales and Stock Status

I'm only a post away if you need more help in dealing with cost sales in QuickBooks. It's always my pleasure to help you out again.