please show formula and all steps and explain please do not use execl

(this is from my class handout, we went over this in class) You've just opened a margin account with $20,000 at your local brokerage firm. You instruct your broker to purchase 500 shares of Landon Golf stock, which currently sells for $60 per share. What is your initial margin? Construct the equity account balance sheet for this position. Suppose the call money rate is 5 percent and your broker charges you a spread of 1.25 percent over this rate. You hold the stock for six months and sell at a price of $65 per share. The company paid a dividend of $.25 per share the day before you sold your stock. What is your effective annual rate of return