The production department of a factory furnishes the following information for the month of March, 2007.

Materials used Rs. 54,000

Direct Wages Rs. 45,000

Overheads Rs. 36,000

Labor hours worked - 36,000

Hours of machine operation - 30,000

For an order executed by the department during the period, the relevant information was as under.

Materials used Rs. 6,00,000

Direct Wages Rs. 3,20,000

Labor hours worked - 3,200

Machine hours worked - 2,400

Calculate the overhead charges chargeable to the job by the following methods,

i. Direct materials cost percentage rateii. Labor hour rateand iii. Machine hour rate.