Hello,
I have to run totals on many rows/columns.
I started a little macro, but would like to learn how to loop thru this data.

Please explain as you go, so I can learn rather than just copy your
excellent code :-)

'Calculate Totals for every 15th row (3 in sample, 8 rows total)

Range("C2").Select
ActiveCell.FormulaR1C1 = "=SUM(R17C3,R32C3,R47C3,R63C3)"

Range("C3").Select
ActiveCell.FormulaR1C1 = "=SUM(R18C3,R33C3,R48C3,R64C3)"

Range("C4").Select
ActiveCell.FormulaR1C1 = "=SUM(R19C3,R34C3,R49C3,R65C3)"

'Move to next Column and calculate (2 in sample, 6 columns total)

Range("D2").Select
ActiveCell.FormulaR1C1 = "=SUM(R17C4,R32C4,R47C4,R63C4)"

Range("D3").Select
ActiveCell.FormulaR1C1 = "=SUM(R18C4,R33C4,R48C4,R64C4)"

Range("D4").Select
ActiveCell.FormulaR1C1 = "=SUM(R19C4,R34C4,R49C4,R65C4)"

Thanks in advance!