Calculation Sales Price From Cost Price


is there any function on ax 2012 to calculate sales price from item cost?

I have a profit rate for items.(5%) and I want to my sales price is calculated by system automatically referenced by item cost. 

For ex. my item(XYZ) cost 100 $ and I should add my profit rate to this cost for define sales price. 

I could use price disc journal. and define my sales price 105$ but I want to it will be calculate automatically.