For Every Point Above X Do Y

I want to pay salespeople a bonus when they sell things at a higher Gross Profit. There is a minimum markup. I want to say for every additional point above the floor (F) well pay (B*C). There is also the actual attainment filed (A). For this example lets say the floor (F) is 22% and the actual attainment is 26%.

Illustrations:
.22 = 0(B*C)
.23 = 1(B*C)
.24 = 2(B*C)
A = .26
F= .22

What I want is:
if A >= F THEN for EACH POINT above the floor add 1*(B*C)

Its actually buried in a larger IF(AND function and I need to be able to drag the function down a long column and have it scale with volume sold. But its just this bit of logic I'm hung up on.