Data entry copy and paste spread sheet

I have some invoices on spread sheets, I need them consolidating onto one sheet, each sheet will contain one years data (see file upload)this is where the data will be entered. I will supply the data to the winning bidder. this should be no more than 3 or 4 hours work maybe less, I have entered the first set of data so you can see what I need. This is just a lot of copy and paste. But it needs to be organized and accurate