You decide to sell 100 shares of Topgun Enterprises short when it is selling at a yearly high of $42.25 .your broker tells you that you're in margin requirement at 60% and if the commission on the sale is $20. wow you are short topgun pays a $.85 per share dividend. at the end of one year you buy your topgun shares (cover youre short sale) at $44 and are charged a commission are $20 and a 5% interest rate what is your rate of return on the investment

*your margin requirement