Homeowner Bob has new kitchen cabinets installed. The cabinet drawer railings have a hidden defect making them prone to failure when fully extended. While opening a drawer filled with knives and cutlery, Bob leans heavily against the drawer to look for something in the back. This causes the railings to fail, sending the drawer and contents crashing down onto his legs and feet. Bob is later found to be $60$ percent responsible for his injuries while the hidden defect is found to be $40$ percent responsible.

If the homeowner and manufacturer are in a jurisdiction that follows the doctrine of contributory negligence, Bob can recovel manufacturer? $\%$ of his damages from the