Suppose you purchase $850$ shares of stock at $$54$ per share with an initial cash investment of $$22,950.$ The call money rate is $5$ percent and you are charged a $1\mathrm{.}5$ percent premium over this rate. Ignore dividends.

Calculate your return on investment one year later if the share price is $$62.$ Suppose instead you had purchased $$22,950$ of stock with no margin. What would your rate of return have been now?