How to hide the standard cost and the standard price for an item for a user.

Step 1 : Go to the Users tab by clicking on 3 horizontal line which is on top left side of the application.
Step 2 : Click on the user's Permission of the user you don't want to give permission of standard price and cost.
Step 3 : First tun off the admin rights then click on Ledger Group.
Step 4 : Unchecked the Sundry Debtors and Sundry Creditors. And save the settings.
Now that particular user can't see the standard price and standard cost.