Konami Code Gaming produces two types of high$-$end gaming controllers, one with a casing made of a polymer that looks like walnut wood and another with a casing made with a polymer that looks like red oak. The casings are made through a joint production molding process that produces $286$ red oak casings and $308$ walnut casings at the split$-$off point. The polymer for the red oak casings requires twice as much cooling time as the polymer for the walnut casings, although all casings are removed from the joint molding process at the same time $($i$.$e$.,$ once the cooling for the red oak casings is complete$).$ The joint production process costs a total of $$6,000.$