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# Working with Numbers

Hi Gary, I recently stumbled across your videos while looking for help about numbers and I have to say they are fantastic!! I just had a few questions regarding numbers. I recently became treasurer of a committee and I have to keep track of the budget, deductions for a total that is constantly changing. I wanted to use numbers so I could have a starting amount, then as we spend, the total changes and then the next amount will change the new amount;thus, there will always be a new total to deduct from. So if I start with \$2820.00 and we spend \$135.00 then the new total will be \$2685.00. Then if i deduct another \$100.00 (this is in a different cell) then the new total will be \$2585.00. The problem is I’m fairly new to numbers and I don’t know how to do this, though I really want to learn how to do these kinds of things. Your help would be greatly appreciated!

— Michael Dreyfus

### Comments: 3 Responses to “Working with Numbers”

13 years ago

I would recommend getting a good book on spreadsheets -- at this level it doesn't matter too much whether you are using Excel or Numbers, spreadsheets pretty much work the same.
In your example, I'd have one column (B) that is a running total and one column that is the expenses (A). So the first row would be column A blank and then column B would be 2820. The second row would be 135 in A and then B would be =B1-A2 for a total of 2685. The next row would be 100 in A, and then you would copy and past B2 into B3 which would adjust the formula to =B2-A3 (2585). You just keep adding expenses in column A and then pasting the formula in column B.

Sandy Milen
11 years ago

I am working with numbers and the have a simple formula of col A * Col B. The formula is in column C. I get the following answer. 152*.19=28.925. The actual answer is 28.88. This has happened numerous times. I have to start a new sheet each time. I try to save this as a template, and I get the same errors each time in the same columns. Any insights?

11 years ago

Hard to tell without seeing it. I've never seen Numbers (or Excel) be wrong. Perhaps check and double-check the cells and the formula.