As a test, I created two Excel files—one containing two and another containing 12 monthly general ledgers with 1 million records each—and then used the Excel Data Model to pivot them together on my $1 ...

Enter test data to verify cells are oriented properly and the formula is working as intended. For example, if the "Clock In" time is 14:00 and "Clock Out" time is 18:30, "Total Hours" should be 4. ...