Matching a Year and then Summing the totals
 

I am trying to create a program which will calculate the totals for a fiscal
year. I would like the program to find the first occurance of a year (Jan)
and then go back 3 cells (or months) and add together the 12 months worth of
information. It needs to be able to do this for an unknown number of years,
which are specified on a different sheet.

Any help would be great!!