ASO Member Formula

Hello Experts ,

We have a ASO cube with members(Level 0's) with some simple member formulas as explained below , the ask is members formula should show data for FY17 and shouldn't show data for FY18 can you kindly help us how it can be achieved ?

sales = A+B+C

sales1 = x+y+z

                    FY17          FY18

sales              200          #Mi

sales1            300          #Mi

A                    100          125    

B                    50             75     

C                    50             75     

x                     100           125   

y                     100           130 

z                     100            150   

Thanks in Advance