Hello, Wasn't quite sure where to post this, but I need some help with an Excel Spreadsheet. I have created a basic one for me and friends outgoings in our house regarding a bill, then it splits it down into two so we can easily see how much it costs us each. I have a third column that I don't know how to set up. What I want is a column to show the difference from last month, and weather thats +£ or -£ than last month. I plan on using different sheets in one workbook for each month of the year. I have noooooo idea how to do it, and hope someone can help. I have attached the speadsheet if thats any help. Edit: Can be downloaded here. Thanks in advance, Mark.