I'm trying to find the sum of a range of numbers which depends of a product number and the date it was issued, between a hole range of products and different dates. Tried sumproduct, sumif, vlookup and sum, nothing seems to work. What can I do?
btw. I have changed the date from ex. 11.11.2011, to 112011 because I only have to use the monthly usage, and though a straight number would be better
btw. I have changed the date from ex. 11.11.2011, to 112011 because I only have to use the monthly usage, and though a straight number would be better
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