Czarina, I may be wrong, but I think I’m seeing an error in this spreadsheet. On the Partial Am Tab, the interest column shows the correct formula in row number 4, but the next row has a different source cell and I think the calculation is incorrect. If I open the workbook and make no changes, you can see the first interest amount is $446.74, and the next line has it at $166.45. That’s a significant change in one month. Cell E5 uses cell “C9” from the input sheet and I think it’s supposed to be using “H15” instead. Can you take a look at this?