Help me please in math

Giuseppi's pizza had orders for $931.00 of pizzas. the prices were $21 for a large pizza, 514 for a medium pizza, and $7 for a small pizza. the number of large pizzas was two less than four times the number of medium pizzas. thenumber of small pizzas was three more than three times the number of medium pizzas. how many of each size of pizza were ordered?

41/17 as a decimal rounded to the nearest hundredth

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)