Hi

In sheet below I managing my stock levels.
Please go to Cell F8, formula there checks In which week (red table) I will run out of my stock and tells me when I have to place new order. Example: Available stock 897400 by taking away usage from each week I will have to place order on 13/07/2015. Everything works, but.

Question : Is there other option to get what I want without Ifs or not that many ifs.
Thanks




Link to file