Okay, this one is a tough one for me but is probably very simple for some of the DAX gurus on this page.
I have two fact tables: Campaigns and Sales. Normally I use one item table for the sales facts that is based upon item number and then associates manufacturer and product catagory. The campaign table has both of those listings but not an item number which means it is a many to many connection which doesn’t work too well. In order to calculate totals, I broke the item table into two pieces: Manufacturer and Product. Some campaigns have a manufacturer but not a product and some have a product and not a manufacturer. I would like to use this data to apply a weighted amount to manufacturers for product campaigns that do not have a manufacturer. I have given these generic names in order to build a foundation. What I don’t know how to do is to bring the two look ups together. I would like to divide the product spend by the number of manufacturers for that product and assign it to the manufacturer to add to manufacturer specific totals.