The existing incentive system for Al Amir SAOG is as under: Normal working week: 5 days of 8 hours each plus 3 late shifts of 3 hours each. Rate of Payment: Day work: OMR 1.6 per hour Late shift: OMR .250 per hour Average output per operator for 49 hours week, i.e., including 3 late shifts = 120 units In order to increase the output and eliminate overtime, it was decided to switch on to a system of payment by results. Following information is obtained. Time rate as usual: OMR 1.600 Basic time allowed for 15 units: 5 hours Piece-work rate: Add 20% to basic piece rate Premium bonus: Add 50% to time. Required: Prepare a statement showing hours worked, weekly earnings, number of articles produced and labour cost per unit for one operator under the following wage systems; (a) Existing Time rate (b) Straight Piece Rate (c) Rowan System (d) Halsey Premium Plan Assume that 135 units are produced in a 40-hour week under straight piece work, Rowan premium system and Halsey Premium system above and the operator earns half the time saved Under Halsey Premium system. a