The Heparin injector pump is a critical element in a kidney dialysis machine. The Heparin pump must maintain an output flow rate of 177 ml with a tolerance of 6.2 ml. A faulty pump requires a field repair service which costs $257. The factory cost to inspect and calibrate a faulty Heparin pump in is $5.1. Designers identify the pressure sensor as a key determinant of the flow rate and the relating linear coefficient is 1.96. Inspection and correction of___________