Margin Fields

I would very  much like to see the following functionality:

Margin/markup percentage functionality to be used in these areas:

Per product

Per Manufacturer

Per Category

This would a great way to not have to manipulate data outside of Zoey before importing.  As All of this need to be worked out before. 

I know that there is a field for cost and sales price but if we were able to put the margin and have Zoey calculate the price this would be great especially when we have 1000's of products and need prices to look pretty (rounded up).