With a header in row 1, how do I insert = WorksheetFunction.Sum(Range("C?:C?"))
in each blank and at the bottom of this column?

Where it will sum 1,2,3 in first blank, then 4,5,6 in second blank and 7,8,9,10 at the bottom.

Column could be 40, maybe 50 + rows, need a sum in each blank cell and at the bottom.

Thanks,
Howard

Header
1
2
3

4
5
6

7
8
9
10