Ron

Just a guess, It maybe that the OP is using L15 as the value to define
the sum of each of the cells along row 28.

Using this I created the following.

=SUMPRODUCT(($I$3:$I$25=$L$15)*(B$3:$B$25))

Each time the user enters the desire interest rate in L15 it will change
the totals along row 28.

We will have to wait till the OP gets back with a clearer explanation.

Cheers
Mick.

On 18/01/2012 8:13 AM, Ron Rosenfeld wrote:
On Tue, 17 Jan 2012 15:57:15 +0000, wrote:


I am trying to come up with an easy to repeat formula (e.g. when adding
a new row the formula is repeated) for calculating the totals in the row
highlighted yellow (see attachment).

I am currently using the formula (below) in row '29'. The formula is
specific to column 'B' for total in 'B29' (highlighted green in the
attachment).

Currently I am having to retype the formula for each new row I add and I
am pretty sure the formula is in a 'bad' format.

"=L15(B3*$I$3)+(B4*$I$4)+(B5*$I$5)+(B6*$I$6)+(B7*$ I$7)+(B8*$I$8)+(B9*$I$9)+(B10*$I$10)+(B11*$I$11)+( B12*$I$12)+(B13*$I$13)+(B14*$I$14)+(B15*$I$15)+(B1 6*$I$16)+(B17*$I$17)+(B18*$I$18)+(B19*$I$19)+(B20* $I$20)+(B21*$I$21)+(B22*$I$22)+(B23*$I$23)+(B24*$I $24)+(B25*$I$25)"

Any help much appreciated.

Thanks
James


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It looks to me as if the formula is in B28, but that is irrelevant to the solution.

The formula posted above can almost be replaced by something like:

=SUMPRODUCT(B$3:B25,$I$3:$I25)

And if you add columns or rows by Inserting them; or if you drag the formula itself, all the factors should self-adjust.

HOWEVER, your formula as posted is illegal because of that leading L15.

You have, in part: =L15(B3*$I$3)...

But I have no idea what the L15 is doing -- there is no associated operator-- or how that will need to be adjusted when you insert rows or columns.