I am trying to calculate commission amount based on different gross sales
with different %s paying on increments. Also want to be able to change gross
sales variables and %s.

Example
=IF(N5<=$A$2,N5*$D$2,IF(N5<=$A$3,(N5-$A$2)*$D$3+$F$2,IF(N5<=$A$4,(N5-$A$3)*$D$4+$F$3,IF(N5<=$A$5,(N5-$A$4)*$D$5+$F$4))))

Meaning - N5=gross sales; $A=sales increment; $D=%; $F=previous calc. added

Of course, I can only put 8 if statements in the formula. How else can this
be calculated with more variables?
--
Anna