Export button

Hi everyone

I'm wondering if anybody knows how to put a button into my excel sheet that exports the numbers in a row to a row in another sheet in the same workbook, without erasing the previous number each time I press the button?
For instance, if I would like to track my income and expences over a year, I would calulate this months income, expences and net result on sheet1 in my workbook. Then I would like to push a button that exports these three numbers to a row in sheet2. Then, next month I will do the same, but now the numbers should be exported to the row below last months numbers in sheet2, so that I can track my incom and expences over a year. Anyone know if this is possible and how to do it?

Thanks very much in advance