Having added the products, I am unable to add the rate per product to be able to compute. How do I add the price rate of the product?

Hey there, Mutwiri.

I'll walk you through the steps of adding sales prices or rates to your products and services. 

Before we proceed, can you tell me if you've encountered any error messages while attempting to add rates to your items? Sharing any additional info will allow me to provide the appropriate troubleshooting steps to fix your concern.

If you already created the products and services, you can simply reopen them again to add their rates. Let me show you how:

1. Go to the Sales menu and select Product & services.
2. Look for the item, then click Edit.
3. In the Sales price/rate field, enter the amount.
4. Select Save.

For more info, you can check out this article: Add product and service items to QuickBooks Online.

Furthermore, you have the option to manually add rates to products in the Rate column while creating your transactions. This provides you with flexibility when assigning rates to individual products.

Once you’re all set up, you can easily track what you buy or sell by running sales reports in QuickBooks.

Please feel free to reach out if you have any additional questions or need further assistance with adding rates to your items or any other QuickBooks-related task. I'll be glad to provide you with the necessary guidance. Have a wonderful day!