Prompt Parcel Service operates a fleet of delivery trucks in a large metropolitan area. A careful study by the company's cost analyst has determined that if a truck is driven 168,000 kilometres during a year, the average operating cost is 14.0 cents ($0.140) per kilometre. If a truck is driven only 78,000 kilometres during a year, the average operating cost increases to 17.0 cents ($0.170) per kilometre. Required: 1. Using the high-low method, estimate the variable and fixed cost elements of the annual cost of operating a truck if it is driven 168,000 kms. (Round intermediate values to 3 decimal places.) Variable cost Fixed cost 2. Express the variable and fixed costs in the form Y= a + bx. (Round "Variable cost per kilometre" answer to 3 decimal places.) Y ** 3. If a truck was driven 123,000 kilometres during a year, what total cost would you expect to be incurred? (Round intermediate values to 3 decimal places.) Total cost