Hide average cost for the subordinates in inventory list

Is there any way to hide the average cost for subordinates(sales persons) in inventory list, as they need to see the stock count they are having an opportunity to see the cost of the product as well, please guide me on this to solve this issue.

There is no way. If someone can see that screen, they will be able to see the average cost. You could print or email the Inventory Quantity by Location report on a regular basis.