Math please help, best answer gets 10 points !!?

Artie was paid $75 for serving at a banquet in the restaurant where he works as a cashier. He worked the rest of the week for $7.25 per hour. The equation y = 7.25 x + 75 represents the amount he made that week. Find the amount he made that week if the x-values are: 10, 20 , and 30. Write them with commas and no spaces and no dollar signs: example 100.15,200,300.50