Hi there, 

I'm glad you're reaching out to us with your question here in the Community. I'll shed some light on this for you.

QuickBooks Desktop has some features that are currently unavailable in QuickBooks Online. I can see how having the option to assign custom pricing to your customers would be very convenient for your business. At this time, this isn't a feature in the Online version of QuickBooks. 

As a workaround, you can set up the same inventory item with multiple price levels. Here's how:

1. Click the Gear icon. 

2. Click Products and Services.

3. Click New.

4. Enter the name of your inventory item, followed by a numbered system (e.g. Hats #1, Hats #2, Hats #3, etc.)

5. Enter the Price pertaining to the inventory item. 

6. Click Save.

Using a numbered system for your inventory means that you can select the same product with various prices. 

Keep in mind, however, that this will separate your inventory items for reporting purposes. 

We're always looking for new ways to improve our products. I'd be happy to submit your feedback regarding this feature to our engineering team for review. 

If you've got any other questions, please let me know. 

Have a great day!