Jobs are issued to X to make 89 units to Y to make 204 units, for which a time allowance of 20 standard minutes and 15 standards minute per unit respectively is credited. For every hour saved, bonus is paid at 50% of the base rate which is K4 per hour for both employees. The basic working week is 42 hours. Hours in excess are paid at time and a half. X completes her units in 45 hours and Y completes his in 39 hours but works a full day. Due to defective material, six of X units and four of Y units produced are scrapped although all units produced are paid for. You are required to calculate for each of them: (a) The amount of bonus payable. (b) The total gross wage payable. (c) The wages cost per good unit made.