It's true that you need to manually enter the cost amount when setting up an item or SKU, 99duckey.

Let me share the steps on how to enter the purchase cost of an item. Here's how:

1. Go to the Gear icon and select Products and Services.
2. Click New in the upper-right hand corner.
3. Select a type of item.
4. Scroll-down to the Purchasing information section and enter the amount in the Cost field.
5. Click Save and close.

I also encourage you to send feedback about this to our product engineers. Feedback or feature request vcan be submitted for review directly from QBO. Here's how:

1. Go to the Gear icon and select Feedback.
2. Type in your feedback and suggestions about the advertisements in QBO. 
3. Click Next to submit them. 

In the meantime, let me share these extra references with you when managing your inventories in QBO:

• Use Reports to See Your Sales and Inventory Status 
• Impacts of Inventory Tracking on Balance Sheet and Profit & Loss Reports 

Reply to us again in this thread or visit the Community anytime you have more questions. We're always here to offer our help again.