The current Minimum Initial Margin requirement is 50%. Maintenance Margin requirements are 30%. You buy 1,000 shares of Acme Enterprises for a price of $50 per share, using the maximum amount of borrowed money allowable. The day after you buy, the stock price rises to $60 per share. On the second day it drops to $40 per share. With the stock at $40 per share now; How many more whole shares of stock can you now buy without adding any money to your account