How can I add inventory with a different value other than the value listed on the item master card? In other words, I do not want to change the value of the item on the item master card. I only want to add a qty. of 10 to my inventory with a lower value.

Hello there, @AESKUTAB.

When you mentioned adding inventory with different values, does it imply adding inventory items with varying purchase prices? If that's the case, it is indeed possible, and I'd be glad to show you how.
 

If you order the items from a vendor, you can follow the steps below.

Here's how:

1. In the left menu panel, go to Purchase Order.
2. In the Vendor field, select the vendor of your orders.
3. Under Item Details, choose the product/services.
4. From there you can adjust the quantity and its rate and hit Save.

    

5. In the upper right corner of the same page click Copy to Bill and it will route you to the Bill tab.
6. On the same page, you can mark the bill as paid.
7. Click Save and close. 

After that, I suggest running an Inventory Valuation Detail report filtering it to the purchased items you've recently added. This report will show the transactions that affect the value of your inventory items.

Additionally, you may refer to this article in managing your reports: Run Reports in QuickBooks Online.

If you mean otherwise, you're always welcome to reply to this thread so we can fix this matter accurately.