need help on a sumproduct function.

Tbl setup
main events (by col)
Front (group)
Col C: qty
Col E: size
Number of colors
Col F thru W, 1 thru 18 (col data down)
Back (group)
Col C: qty same as front (no col)
Col E: size
number of colors

Front: Select qty + size + number of colors + (back: qty + size +
number of colors = $

I can get the sumproduct to work for the front color/qty/size, error
out when I add the back group.

Can you tell me what I'm doing wrong....

Thanks so much


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Victoria4338
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