Answer:
His commission was 22.5
Explanation:
Answer:A=22.5
b=40%
c=12.6
a is 900/100=9, 9x2.5
b is 100/50 = 2, 2x80= 140%, 140%-100%= 40%
c is 12/100=0.12, 0.12x105=12.6
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