how do i calculate a running payoff amount?

[phooey]

I'm doing an amortization.

I have everything working except I want to do a 'payoff' cell....

The payoff will be the sum of payments plus the principal balance.

How can I have this cell update and change as new payments are made?

IE.... if 5 pmts are made, payoff is sum of 5 payments plus the principal
balance.

If 6 pmts are made, its the sum of 6 payments plus the new principal balance.

I only want to count the principal balance if there is a corresponding
payment,
if there is not payment then payoff stops at the last payment made

 

[dkinn]

If I read this right something like the following formula might work

=IF(ISBLANK(A13),"",SUM($A$10:A13)+$B$13)
if your payments start in A10 and continue down the A column and the
principla is in B13

as you copy down the formula it is anchored at A10 but the A13 will continue
to incriment down

Hope this helps

David

 

[phooey]

some works... some doesn't.. probably me...

heres what I'm looking for.. the payoff is the sum of the payments made plus
the principal balance (after payments).

I have the spreadsheet working to figure the rest, but I want the 'payoff'
to be calculated in one static field.

I can send you what I have and maybe that might help explain?