1. You've been contracted by a construction company to manage their contracting. They have a choice of either buying an excavator or renting it. To buy it, the company would have to pay $105,000, but owning it will require approximately $10,000 in maintenance costs per year. The price to rent the excavator is $5,000 per month, with a one-time service charge of $2,000. What's the minimum number of months the company needs to use the excavator in order for it to make sense to buy it rather than rent? A. 8 months B. 16 months C. 21 months D. 25 months