XL2000: Keeping a Cumulative Total in a Column or Row (214149)

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To keep a running total of cells A1 through A10 in column B (for example, B1 contains the value from A1; B2 contains A1+A2; B3 contains A1+A2+A3; and so on), follow these steps:

1. Start Excel and open a new workbook.
2. In cell B1 type the following formula:

   =SUM($A$1:A1)

3. Select cells B1 through B10.
4. On the Edit menu, point to Fill, and then click Down.
   
   The $A$1 (absolute reference) is constant in each cell, although the A1 (relative reference) is updated in each successive cell to refer to the adjacent cell in column A.
5. Type the following data into the worksheet:

      A1:  1
      A2:  6
      A3: 77
      A4: 94
      A5: 32
      A6: 44
      A7: 33
      A8: 22
      A9:  6
      A10: 5
   					

6. The cells in column B return the following data:

      B1:    1
      B2:    7
      B3:   84
      B4:  178
      B5:  210
      B6:  254
      B7:  287
      B8:  309
      B9:  315
      B10: 320
   					

TIP: To calculate a running average of the numbers in column A, replace SUM with AVERAGE in the formulas.