I created a worksheet using the sumproduct formula and it runs very slow.
15-25 minutes to calculate at every change. I guess its to big for my
computer to run ( the worksheet has 248 columns and 100 rows of formula)
Can I speed it up somehow? Or can I get I get match to do multipe criteria?

=SUMPRODUCT(--('A-L Data Table'!A$6:A$2496=$A10)*--('A-L Data
Table'!B$6:B$2496=$D3),'A-L Data Table'!$D$6:$D$2496)

Maybe something like =INDEX('A-L Data Table'!D$6:D$2500,MATCH($A10,'A-L Data
Table'!$A$6:$A$2500,0)*MATCH($D$3,'A-L Data Table'!$B$6:$B$2500,0),1)


Thanks,

Todd