Consumers value high-quality dirt bikes at $6,000 and low-quality dirt bikes at $2,500. The supply of used high-quality dirt bikes is QH = 0.5PH – 2,000, while the supply of used low-quality dirt bikes is QL = PL – 1,000. Potential buyers cannot distinguish the difference between the two. Buyers base their willingness to pay on the belief that half the used dirt bikes are high-quality. At the buyers' willingness to pay sellers will offer _____ high-quality bikes and _____ low-quality ones.
A). 125; 3,250
B). 450; 900
C). 2,000; 2,000
D). 3,000; 1,500