18) A delivery service is buying 600 tires for its fleet of vehicles. One supplier offers to supply the tires for S80 per tire, payable in one year. Another supplier will supply the tires for $15,000 down today, then 550 per tire, payable in one year. What is the difference in PV between the first and the second offer, assuming interest rates are 8.8%? A) 5618 B)-52316 C) $2316 D) $1544