Pay calulator - repost

I have a excel calculator that's already made and works well, but when you changed to a different year, changing the dates some of the cell don't work correctly like before. I'm looking for fixing the current sheet with a few addition, plus making the same sheet that works for the next 4 years. can you give me a cost please. The things i would like added is in each month a side block that says travel days, so I can add travel days at a certain rate and it would calculate that rate and it would go into the by weekly total just like everything else, and it keep s running total of of how many travel days like you see on my sheet that shows offshore days for the month and at the end for the year, the next block would do the same but be labeled office days. I know the rate would be more than I put below some give me a price