How do you do this 6th grade math problem? Im confused...There are two seperate ones!?

For the first one, times 350 by 0.8, because that is what 80% means. For the commission one, multiply the 50$ by 20. there are 20 5's in 100, and that. To do a proof do 50 x 20 = 1000. Now times 1000 x 0.05 (commision, or 5%). It equals 50