Anew cement mixing truck can be purchased for $100,000 and will have a salvage value of $50,000 at the end of 5 years. the cost of concrete mix for the truck is $100 per cubic yard. alternatively, the construction company can pay $105 per cubic yard to have concrete delivered by a third party. assume the construction company can order the concrete mix or delivery for the whole year on their account, and pay the full balance at the end of each year. at an interest rate of 10% per year, the minimum cubic yards of concrete that must be used each year to justify the purchase of a truck is closest to: