A method is provided for tracking prescreened candidates by a tracking employer. The MAC instruction indicates a first vector register as a first operand, a second vector register as a second operand, and a third vector register as a destination. The ECU includes a first correcting circuit and a second correcting circuit. A control circuit receives the signal from the sensor and supplies power from a battery to a motor to drive a dispensing means to dispense a desired length of towel from the roll.