How do I hide the selling price and purchase price of items from specific users in my organization?

To hide the item pricing details for a specific group of users:

Go to Settings.
Under Module Settings, select Items under General.
Navigate to the Field Customisation tab.
Click the dropdown icon next to Selling Price or Purchase Price, and select Configure Access.
Choose Hide Field next to the required role.
Click Save.

The permissions will be updated. The users under the selected role will not be able to view those fields.