each1teach1

ok thank you I hope I will manage to find the command myself if so, I will gladly share it, but this could take quite a while.

Thanks a lot for your quick help. entering the price per unit works fine. it is also displayed correctly. when I change the price of a product, the size e.g. 1 Liter stays the same. I was wondering if it was possible that the calculation of the price per unit could be automatic. as I am new to prestashop and the programming I dont know how to access the feature id=9 of a product (my bottle size in liters) also I dont know the command, to write the unit price. Neither do I know where to place it. or am I missing some vital point? thank you!

Hi Everyone! we sell bottles of different size. the bottle size is the product feature with the id# 9. It is formattet like: "0,7" (in liters) divisions ain't rocket-science I want the price per unit to be calculated automatically when the price is set. like: read price read feature id=9 (liters -- replace comma by point?) divide and save as price per unit. i would highly appreciate any hints! Thank You! (ps 1.6.1.4)