Hey,

Need Help,

I am working on a proforma statement, REFER THE ATTACHMENT

A B C D E F G H I J Q
1 jun'14 jun'14 jun'14 jul'14 jul'14 jul'14 Aug'14 Aug'14 Aug'14
2 beg. Inv Purchas Unit Sold Beg. Inv Purchas Unit Sold Beg. Inv Purchas Unit Sold
3 foundation 4 10 11 3 15 13 5 16 18
4 Lipstick 4 10 11 3 15 13 5 16 18
5 Shimmer 4 10 11 3 15 13 5 16 18
6 Powders 4 10 11 3 15 13 5 16 18
7 Nail Lacquer 4 10 11 3 15 13 5 16 18
8 Eye Shadows 4 10 11 3 15 13 5 16 18
9
10
11 Total Purchase for june to aug 2014
12 Foundation ??

this is just an small sample of what i am working on i have got purchases, cogs and ending invenory for 2 years Products wise i want to add purchases for the particular product.
i.e. if for above data i want to find out the foundation purchased through june 2014 to aug 2014 what will be the formula