Machine M For the following two machines NT=750 pieces Machine m p = 10 pieces per hour 5-2 hours 1 = $1.50 per hour d = $0.40 per machine hour P = 30 pieces per hour S = 6 hours L = $1.50 per hour D = $1.10 per machine-hour The increase of the percentage of Carbone in Carbone steel perform the wear and the hardness Machine M For the following two machines NT=750 pieces Machine m p = 10 pieces per hour 5-2 hours 1 = $1.50 per hour d = $0.40 per machine hour P = 30 pieces per hour S = 6 hours L = $1.50 per hour D = $1.10 per machine-hour The increase of the percentage of Carbone in Carbone steel perform the wear and the hardness