Comparing the Same Month Sales between Two Different Years.

I am trying to create a function where the user can type in a single month, and 2 different years, and it will calculate/compare that single month from the 2 different years entered.

For Example: I type in January, and I type in 2014 and 2013. The excel formula will spit out whether January 2014 is over/under January 2013.

See attached for my sales report. You can see where I left some space for the requested function.

Please Please Please can you assist, as it is the last change I have to make to the sales report.

Thank you,

I recommend you scrap every little bit of your sales report
and start from scratch with Tables and PivotTables and Slicers.
No formulas, no code needed.
http://www.mediafire.com/view/bu5qtwb56yf8enf/06_06_14a.xlsx

I agree, pivots would be better, but with your data, you might struggle, you would need to unpivot it.

Where would this summary go, and what would it look like?