Mr. Manzo is buying skating equipment for the after school program. He gets a reduced rate if he buys 8 knee pads for every safety helmets. The reduced rate is $2.25 per pair of knee pads and 22.50 per helmet the tax sale on each item is 6% he has $400 on his budget to buy these items what is the greatest number of the knee pads and helmets he can buy in a reduced rate if the ratio of knee pads to helmets is 8:3.