Kevin is an auto mechanic. He spends 22 hours when he replaces the shocks on a car and 22 hours when he replaces the brakes. He works no more than 4848 hours a week. He routinely completes at least 22 shocks replacements and 66 brake replacements a week. If he charges $450450 for labor replacing shocks and $300300 in labor for replacing brakes, how many jobs of each type should he complete a week to maximize his income?