I have data like the table below. I need to sum the numbers in column C based
on criteria in columns A and B. Something like a multiple criteria SUMIF


A B C
1 a red 1
2 a red 2
3 a white 2
4 b blue 2
5 c red 2

I need to have a formula that allows the criteria to be changed for each
cell in a sheet like below that sums the values in the array above based on
the values in Row 1 and Column A.

A B C
1 Red Blue
2 a A2,B1 A2,B2
3 b A3,B1 A3,B2
4 c A4,B1 A4,B2

Thanks in advance
RDW