From the following data you are required to ascertain the cost of running the motor lorry per tonne mile.

Total tonnage carried in a week: 30

Total mileage in a week: 600 miles

Details of the above are:

Miles

Tons

Monday

120

6

Tuesday

125

5

Wednesday

110

4

Thursday

100

5.5

Friday

80

4.5

Saturday

65

5.0

600

30

Expenses for the week are as follows:

Driver’s salary: Rs 600 p.m.

Cleaner’s salary: Rs 200 p.m.

Petrol, oil, etc.: Rs 1.00 per mile

Repair and maintenance: Rs 300 p.m.

Depreciation: 4,800 p.a.

Other expenses: 500 p.m.

Assume: 4 weeks in a month.