SafeCo makes three types of roll bars for the off-road enthusiasts. Their PrimoBar is their top-

of-the-line product and sells for $385. Their StrongBar product, which uses less materials, is

their best seller at $290. Their EcoBar passes all safety measures and sells for $250. SafeCo roll

bars are made from two components: steel tubing and steel plates. Roll bar manufacturing

requires two production lines: a bending and welding line, and a painting, finishing and

packaging line. The PrimoBar model uses 25 feet of tubing, 6 steel plates, and requires 2.5

hours of bending and 2 hours of painting. The StrongBar model uses 20 feet of tubing, 4 steel

plates, and requires 2 hours of bending and 1.5 hours of painting. The EcoBar model uses 18

feet of tubing, 4 steel plates, and requires 1.8 hours of bending and 1.5 hours of painting.

SafeCo has reported they have 30,000 feet of steel tubing, and 6000 steel plates. They also

have 2500 hours available in their bending and welding line, and 2000 hours available in their

painting, finishing and packaging line. SafeCo management has required that each model of roll

bar must account for at least 20% of their total production. What is the best mix of products to

maximize their revenue?