Excel auto accumulation formulas

[Arix]

Hi hello,

I need a formula for auto accumulation formula like example:

John need to give me USD50 everyday for one month, so if he never paid the
money i will key in 0.00 in that collumn and the ammount accmulated for today
is 50.00 and the next day calculation like USD100, but if he did the payment
full i will key in 50.00, if he only pays USD30 i will key in 30.00, so the
balanse out standing will shows 30.00 for today and will shows 80.00 on the
next day. I need a formula for every single day it auto accumulate USD50.

I'm trying alot of formula but none is working. Thank You for you help!!!

 

[Jacob Skaria]

With data as below...apply the below formula in cell B2..and copy down as
required

=(COUNT($A$2:A2)*50)-SUM($C$2:C2)

Col A Col B Col C
Date Pending Actuals
5/11/2010 0 50
5/12/2010 0 50
5/13/2010 0 50
5/14/2010 30 20
5/15/2010 80
5/16/2010 130
5/17/2010 180
5/18/2010 230
5/19/2010 280
5/20/2010 330
5/21/2010 380
5/22/2010 430
5/23/2010 480
5/24/2010 530
5/25/2010 580