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up and down array
I need to sum (entered as array in one cell) a series of cells that go up
multiplied against a series of cells that go down. I have a row of four cells A B C D Row 1 2 5 3 6 and another row A B C D Row 3 1 2 3 4 the formula I need (my attempt at which is: =SUM(A1:D1*OFFSET(G28,0,-1*A3:D3+1)) should do the following: multiply A1*D3 multiply B1*C3 multiply C1*B3 multiply D1*A3 and sum them up. Where am I going wrong? -- Boris |
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