Excel Question??

Of if you didn't know the sum function:
=a1-b1-b2-b3-b4-b5-b6-b7-b8-b9-b10-b11-b12-b13-b14-b15-b16-b17-b18-b19-b20-b21-b22-b23-b24-b25-b26-b27-b28-b29-b30-b31-b32-b33-b34-b35-b36

But I think it's easier with the sum.

All of this is VERY elementary use of Excel. Don't you think it would be useful to do some study? There are lots of nice introductory books (in the bookshop and the library) and tutorials (on Internet) and you might learn quite a lot of useful things.

Kees

Cell a1 enter3,500
cell b1 enter payment amount for first day, e.g. 150
In cell c1, enter 3,350 as the result for the first substraction.

At cell b2, enter the next day's value, and at cell c2, enter the formula =sum(c1,-b2), which returns the balance for the second day. Now, copy the formula in cell c2 to the cells below by placing the cursor at the bottom right corner until it changes to a +, then drag down..... Column c then shows the ''cumulative'' balances for each day as you enter the value for each day to column b.... You will notice that the last balance will be shown all the way down in column c. Hpowever, you can hide the unwanted values by a custom format of the cells (e.g. change the font color to white.) so that only the new balance will appear as you go along...(leave to you to figure it out !)

I hope the above works for you, and that I have described the procedure correctly. I am not an expert, and I suspect this is only one of the methods to achieve what you require.