HOW CAN BE STANDARD USER LIMITED TO CUSTOMERS BE RESTRICTED TO KNOW THE PURCHASE PRICE OF PRODUCTS?

Hi there, @waseemlatif.

I can see how restricting a standard user to access purchase price would be helpful. For now, you can only limit or permit them to manage users, edit company info, or manage subscriptions. Rest assured that I'll relay this message to our team in concern here on my end and add your vote for this one.
 
You can also share your thoughts and ideas through your account. Our product development team reviews all the feedback we receive to ensure we’re meeting the needs of our customers. 

Here's how:

1. Select the Gear icon at the top, then Feedback.
   
2. Enter your comments or product suggestions then select Next.
3. You'll be provided a list of suggested Help articles related to your comment. You can read through them or select Skip and send message.
4. From the drop-down, choose the appropriate category, then select Send message.

We also have an awesome write-up that provides more info on how to manage user roles and limit their access to specific tasks. Refer to this link: User roles and access rights.

You can swing by anytime you need help with managing users in QuickBooks. I'm always here to help.