Sum product with dynamic number of columns

[dragonheart]

Hi, I have a question which I hope will be easy to experts such as yourselves. I want to do a sumproduct or sumifs that uses the first two columns as the criteria (e.g. I want all Product A and Color combinations) and I want the number of columns to sum to be dynamic based the week we are in. For example if we are in Wk7 I would like to sum through Wk7 but if we are in Wk10 I want it to sum through Wk10. Can anyone think of an easy way to do this either with a formula or VBA?

[TABLE="width: 500"]
<tbody>[TR]
[TD][/TD]
[TD][/TD]
[TD]Wk1[/TD]
[TD]Wk2[/TD]
[TD]Wk3[/TD]
[TD]Wk4[/TD]
[TD]Wk5[/TD]
[TD]Wk6[/TD]
[TD]Wk7[/TD]
[TD]Wk8[/TD]
[TD]Wk9[/TD]
[TD]Wk10[/TD]
[TD]Wk11[/TD]
[TD]Wk12[/TD]
[/TR]
[TR]
[TD]ProductA[/TD]
[TD]ColorA[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]ProductA[/TD]
[TD]ColorB[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Product B[/TD]
[TD]ColorA[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]ProductC[/TD]
[TD]ColorA[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]ProductA[/TD]
[TD]ColorA[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

 

[bbott]

Welcome to the board.

How are you determining the week number (e.g. calendar date, fiscal calendar date, date in a cell)?

 

[dragonheart]

I will have a cell where the week will be input. Say Wk8 will input 8.