You are holding call options on a stock. The stock's beta is 0.74, and you are concerned that the stock market is about to fall. The stock is currently selling for $15 and you hold 1 million options on the stock (i.e., you hold 10,000 contracts for 100 shares each). The option delta is 0.78. How much of the market-index portfolio must you buy or sell to hedge your market exposure? (Enter your answer in dollar not in millions.) Market index portfolio to:

im confused as I believe the answer is 8.66 but its telling me its incorrect