What can Marla enter into cell A11 to find out how much money is left in her budget and to make sure the cell is updated whenever she changes any of the other costs? = A2-A4-A6-A8-A10 + A2-A4-A6-A8-A10 = A4-A6-A8-A10+A2 + A4-A6-A8-A10=A2

Personally I have my budget spreadsheet with all of my expenses in columns. Then I have a column showing my estimated paycheck (updating with actual# later). Then the formula in the "Remaining" column that I use is this: sum ((A1:A99) - A100) Where A1 through A99 (or whatever# of expenses you have) and - A100 or whatever cell name your paycheck/money is entered into - and that's all I do. I actually have a 3 year budget, including birthdays, holidays, vacations, etc. so that you can plan ahead for any expenses and save away any extra.