A graph has quantity on the x-axis and price (dollars) on the y-axis. A demand line goes through (20, 60), (40, 45), (60, 30). A supply line goes through (20, 15), (30, 30), (40, 45), (60, 75), (70, 90). A store’s supply/demand graph for ceiling fans is shown above. If the price is at the equilibrium point, how much money will the store make selling ceiling fans? a. $4,500 b. $1,800 c. $1,200 d. $900