The Owner of a Local Delicatessen Is Deciding Whether to Lease

The owner of a local delicatessen is deciding whether to lease a company van. If the van is leased, the company would avoid paying its vendors to deliver the supplies and food purchases. The owner has negotiated a potential lease contract that would require a down payment plus a flat monthly rental payment. At the end of each year, an additional "contingency" rental payment would be required if the total number of kilometres driven exceeds 12 000. The owner has estimated that the van will be driven 900 kilometres per month for picking up supplies and food purchases, so she does not expect to incur a contingency annual payment. Based on these kilometres, the owner has calculated the expected amount of cost for fuel, repairs, and maintenance. She has received a quote from her insurance company for the next six months' insurance. She plans to hire a part-time employee at $15 per hour to drive the van. The employee will work a flexible schedule based on the deliveries required. Items 1 through 7 are relevant costs for this decision. Indicate whether the dollar amount of each relevant cost is most likely
a. certain or
b. uncertain.