28. Portfolio Margin (LO3, CFA4) Assume that you have identified three different stocks that you would like to purchase. You decide to buy 100 shares of each stock. Stock A is priced at $30; Stock B is priced at $40; and Stock C is priced at $50. Assuming you deposit $7,200 of your own money and borrow the remainder, construct the equity account balance sheet for this trade. If the maintenance margin is 30 percent, at what portfolio value would a margin call result?