I need An Excel File Edited

2nd time I've had to do this

I want to track the cost and income of 4 websites I'm gonna be working on for the new year going forward

so I can the excel file to add all the costs put and income up when I input it to give a total

Please be confident you can do this so I don't waste my time again.

I've already laid the template I just need a excel wiz to add them all together so shouldn't take long at all then.