Sumproduct with multiple named ranges

To best describe or illustrate your problem you would be better off attaching a dummy workbook. The workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

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firstly, if you intend to copy whatever formula you have in C28, all the way across to P28, why even test for the year? You could just use the range above - or am I missing something here?

Also, (forget the formula for now) what exactly are you trying to do/calculate?

Thanks,

I do not intend to copy that formula from C28 to P28; I was only showing that as indicative of a working first segment of a formula.

The goal is to have "Switches" in C3:J3 (or C4:J4, etc, by company), that determine how much of the operating costs on a per year basis is each company responsible for.

E.G Company 1 would be responsible to pay (25%, since they are 1/4 of the companies of) $371,319 out of a total of 393,040, because their deal, excludes Legal & Professional and Licenses & Permits.

For our purposes, I don't need to calculate the 25% now, only the line items to be included, by year (which will be dragged).

Additionally, the reason for two different dates lines, is that in the non-dummy version, the formula & dates will be on a different sheet than the switches, and a different sheet than the operating expenses.