If statement problem

=IF(L2592="A",'Master Factors'!$C$6,0)
=IF(L2592="B",'Master Factors'!$C$8,0)
=IF(L2592="C",'Master Factors'!$C$10,0)
=IF(L2592="D",'Master Factors'!$C$12,0)

I would like to have the equation cell consider these four formulas to populate one result. The values from "Master factors" are a numeric value.