The production department of a factory furnishes the following information for the month of March, 2016. Materials used SAR 120000 Direct Wages SAR 45000 Overheads SAR 60000 Labor hours worked 40000 Hours of machine operation 30000 For an order executed by the department during the period, the relevant information was as under. Materials used SAR 900000 Direct Wages SAR 450000 Labor hours worked 5500 Machine hours worked 3500 Calculate the overhead charges chargeable to the job by the following methods; i. Direct materials cost percentage rate ii. Labor hour rate and iii. Machine hour rate.