input is like
Type,Financial_yr,Month,Amount
T1 ,2010 ,April,1000
T1 ,2010 ,May ,2000
T1 ,2010 ,June ,3000
T2 ,2011 ,May ,1500
T2 ,2011 ,July ,3500
T2 ,2011 ,Aug ,4000
My output wiil be like
Type,Financial_yr,M1 ,M2 ,M3 ,Total_amount
T1 ,2010 ,1000 ,2000,3000,6000
T2 ,2011 ,1500 ,3500,4000,9000