I have 138 Excel Workbooks with 12 sheets each. That’s 1656 sheets I need data from plus 4 totals from each, so in total I need 6624 formulas. The Sheets are named 1-12, and the workbook names are "Last name, First name." I need $J$15, $J$16, the sum of $J$15:$J$16, and $K$22 from each sheet...