From the data given below, calculate the machine hour rate: Per annum $ Rent of the department (space. 720 occupied by machine is 1/5 of the department) Lighting (number of men in the department, 12, two men are engaged on this machine) 228 Insurance 36 Cotton waste, oil, etc. 60 Salary of foreman (one-fourth of the foreman's time is occupied by this machine) 6000 The cost of the machine is $9,200 and it has an estimated scrap value of $200. It is ascertained from past experience: (i) that the machine will work for 1,800 hours per annum; (ii) that it will incur expenditure of $1,125 in respect of repairs and maintenance; (iii) that it consumes 8 units of power per hour at the cost of $1 per unit; and (iv) that the working life of the machine will be 10 years