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C       t   s   u   v
0.0001  1   2   3   4
0.0002  5   6   7   8
0.0003  9   0   1   2
...
37 in total

K = SUM [C * a1^t * a2^s * a3^u * a4^v]

Although not precisely correct, I gather most of you will figure out how the above looks like.

a's are known.

Is it possible to do this as a one liner in Excel, instead of making another column for the product, then summing them up down below?

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where are the As stored? –  nutsch Nov 28 '12 at 20:15
    
@nutsch - Anywhere within that sheet. They're constant so ... $N$34 is a1, and so on ... –  ldigas Nov 28 '12 at 20:51

1 Answer 1

Try using this formula, entered with Ctrl+Shift+Enter as an array formula:

=SUMPRODUCT(A2:A34*$N$34^B2:B34*$N$35^C2:C34*$N$36^D2:D34*$N$37^E2:E34)
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