Answer:
B) $ 450
Step-by-step explanation:
Commission Alec earned for first $1000 = 12% of 1000
=0.12 * 1000
= $ 120
Balance sales amount = 3200 - 1000 = Â $ 2200
Commission Alec earned for the  balance $2200 = 15 % of  2200
=0.15 * 2200
= $ 330
Commission earned by Alec last month = 120 + 330 = $450