Use the following table to answer the question below. Price per Unit Quantity Demanded Quantity Supplied per per Year Year $5 2,000 0 10 1,800 300 15 1,600 600 20 1,400 900 25 1,200 1,200 30 1,000 1,500 A surplus of 500 units will occur when the price is A) $30 per unit. B) $20 per unit. C) $15 per unit. D) $10 per unit.