The quantity of a product that is demanded is 5,000 units when the price is $250. When the price is $225, the demand is 8,000 units. The manufacturer will not market the product if the price is below $100. For each price increase of $60, the manufacturer will market an additional 2,500 units of the product. Find the equilibrium quantity.
a) 9,528
b) 19,681
c) 5,928
d) 6,915
e) None of the above