3 CostVolumeProfit Analysis Paul buys mattresses for $89 and sells them for $147. He pays $1,200 per month to rent his store and $1,100 a month plus a commission of 6% of sales revenue to his sales staff. If Paul sells 300 mattresses this month, what is his contribution margin? Select answer from the options below $12,642 $17,400 $15,798 $14,754