An investor short sells 100 shares of stock short at $40. The initial margin is 50% and the maintenance margin is 40%. 28. What is the minimum amount of deposits required by this short sale? a. $2,000 b. $1,600 c. $6,000 d. $3,000 29. What is the actual margin if the price increases to $42? a. 50.00% b. 42.86% c. 47.62% d. 45.00% 30. What is the price that trigger the margin call? a. $25.00 b. $33.33 c. $37.50 d. $42.86