Answer: $924
Explanation:
From the question, we are told that if Raul has a sale of $280 he'll earn $40 as commission. This shows that he earns 40/280 = 1/7 as commission.
If Raul would like for his commission to be $132, he'll have to make a sale of:
Let the sale be represented by a
= 1/7 × a = $132
a = $132 × 7
a = $924
He'll have to make a sale of $924