Max is going to paint the four walls of his room. two of the walls are 15 feet long by 8 feet high. the other two walls are 30 feet long by 8 feet high. his options at the paint store are below.

one gallon of paint costs $12 and covers 350 square feet of area.

1/2 gallon of paint costs $8 and covers 175 square feet of area.

if each wall requires 2 coats of paint, what is the minimum cost of painting the four walls of max's room?