2. Ali and Abdullah are working in Al Safa Manufactures Ibra. The following information is taken from the records of the company Piece rate is 600 baisa per unit Standard output 30 units per day of 8 hours Outputs; Ali - 22 units and Abdulla - 34 units Calculate wages of workers under: a. Merrick's differential piece rate b. Also find out the wages earned under Halsey - Weir plan when: Ali - Standard Time- 10 hours, Time taken - 8 hours and hourly rate OMR 4 per hour. Abdulla - Standard Time - 10 hours, Time taken - 12 hours and hourly rate OMR 5 per hour