Adealer paid $10,000 for a boat at an auction. at the dealership, a salesperson sold the boat for 30% more than the auction price. the salesperson received a commission of 25% of the difference between the auction price and the dealership price. what was the salesperson's commission?

10,000*.30= 3,000
10,000+ 3000 = 13000 is how much the salesperson soled it for. 
13,000-1,000= 3,000 (the difference) 
3,000*.25 = 750 it 25% of the difference of the auction price and the dealership price. 
So the commission that the sales person received was worth $750 I think thats correct.