I was referred to this forum after searching Google all morning looking for an efficient solution to a seemingly simple question about dragging down a formula.

I have a body of data (600 rows x 100 columns) that I'd like to analyze daily, pasting in a fresh 600x100 batch of numbers and crunching them the same way. Each 6 rows, the data repeats itself with a different variable (stock).

Starting with row 610 (to get outside the cut/paste input data area) I'm simply trying to drag down a percent change formula from each of the six-row groups into new rows 610 to 710.

That is, in B610 I'm looking for the value of the formula =(B$4-B$3)/B$3, and on the next row the value of =(B$10-B$9)/B$9 and so on for the next 98 rows.

But using Excel 2002 SP3, I can't seem to get the calcs to occur only every 6th row by dragging or cutting/pasting. I've tried selecting several cells at once, selecting a group of individual cellls, using the crosshair handle as well as the cell perimeter and used the shift and control keys all to no avail. Gotta me missing somthing really basic here!

I'm almost sure I've done this before with no problem at all, just forgot how.....maybe I had Excel 2003 at work and functionality was different....we have not started using 2007 yet.

Not sure how to attach image, but hopefully my question is simple enough as I think I'm missing some very obvious trick here.

Thanks in advance for thoughts here.

Regards,

Gordon