c. If the customer will become a repeat customer, the cash inflow changes. The cash inflow is now
one minus the default probability, times the sales price minus the variable cost. We need to use
the sales price minus the variable cost since we will have to build another engine for the customer
in one period. Additionally, this cash inflow is now a perpetuity, so the NPV under these
assumptions is:
NPV = –$2,520,000 + (1 – .005)($2,760,000 – 2,520,000)/.029
NPV = $5,714,482.76 per unit
d. It is assumed that if a person has paid his or her bills in the past, he or she will pay his or her bills
in the future. This implies that if someone doesn’t default when credit is first granted, then they
10. The cost of switching is any lost sales from the existing policy plus the incremental variable costs
under the new policy, so:
Cost of switching = $680(1,070) + $455(1,120 – 1,070)
Cost of switching = $750,350
The benefit of switching is any increase in the sales price minus the variable costs per unit, times the
incremental units sold, so:
11. The carrying costs are the average inventory times the cost of carrying an individual unit, so:
Carrying costs = (2,590/2)($5.75) = $7,446.25