Job, Batch & Service costing

Good day Mr. Moffat,

Kindly help me with this question.

A truck delivered sand to 2 customers in a week. the following details are available.

Customer Weight of goods delivered (Kg) Distance covered (Km)

X 500 200
Y 180 1200

Total: 680 1400

The truck cost $3060 to operate in the week.Each customer delivery was carried
out separately, and the truck made no other deliveries in the week.

What is the cost per kilogram/kilometre of sand delivered in the week (to the nearest $ 0.001)?

A. $ 0.003
B. $ 0.010
C. $ 2.186
D. $ 4.500

The correct answer is B. But my problem is that every time I do my calculations, I end up getting a completely different answer to for this question.

May you please help me out with this problem, along with the correct calculation?

Thanks in advance.