Answer:
$4,200
Explanation:
First let's find the total commission from the first $33,000
33,000 x 0.07 = 2,310
Now we have to find the commission from the remaining sales
54,000 - 33,000 = 21,000
21,000 x 0.09 = 1,890
Now add em up
2310+ 1,890 = 4,200