Answer:
Step-by-step explanation:
The salesperson sold the boat for the whole amount of 12000 which is 100% of the boat's price plus an additional 30%. So he sold the boat for 12000(130%) or 12000(1.3) to give us that he sold the boat for $15600. The difference between what he sold it for and what was paid for it at auction is $3600. 25% of 3600 in equation form is .25(3600). The word "of" here means to multiply. .25(3600) = 900. His commission is $900