Design a basic spreadsheet

I'm looking to have a spreadsheet prepared to allow me to record monthly costs. The spreadsheet should allow me to add categories of different costs and allow me to compare actual against projected costs. At the end of every 6 month period I should be able to see exactly how much has been spent each month and how it compared to the budgeted figure. Also, I need to be able to see how much I spend in each expense category over a 6 month period.