I think this is possible.
To start with, let's take the simplest case. Instead of two workbooks, you have one and instead of a sheet for every day of the week, you have only one sheet. How are you going to create a list of only those people with an "x" next to their names?
You have 2 options:
1. use VBA
2. use formulas
You put the question in the "Programming" section, so I'm thinking you want VBA, and this can pretty easily be done using VBA, I think. (Famous last words?)
But, the example you posted is a formula. I think it can also be done with array formulas and Indirect cell references. Strating with the simplest case, the following array formulas will return only row numbers (which can be combined with the INDEX function to bring back cell contents) for those rows that have an x in column A. The first cell would have this formula:
each subsequent row will have a formula like this:
You can avoid using the Ctrl+Shift+Enter routine if you use the SUMPRODUCT function:
Anyway ... let us know if you want to use formulas or VBA.
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