Suppose you want to buy 500 shares of Amazon at a price of $2,000 per share. You put up $600,000 and borrow the rest. What does the account balance look like? What is your margin? Show all work.

Suppose that in the previous problem you shorted 500 shares instead of buying. The initial margin is 50 percent. What does the account balance sheet look like following the short? Show all work.