ILLUSTRATION 5 In a factory, the basic wage rate is 100 per hour and overtime rates are as follows: Before and after normal working hours 175% of basic wage rate Sundays and holidays 225% of basic wage rate During the previous year, the following hours were worked - Normal time 1,00,000 hours Overtime before and after working hours 20,000 hours Overtime on Sundays and holidays 5,000 hours Total 1,25,000 hours 1,000 hours The following hours have been worked on job 'Z' Normal Overtime before and after working hrs. Sundays and holidays Total 100 hours 25 hours. 1,125 hours You are required to CALCULATE the labour cost chargeable to job 'Z' and overhead in each of the following instances. (a) Where overtime is worked regularly throughout the year as a policy due to the workers' shortage (b) Where overtime is worked irregularly to meet the requirements of production. (C) Where overtime is worked at the request of the customer to expedite the job