Andy Hastings borrowed 500 shares of stock from a broker. This stock is currently selling for $25 a share ($12,500). The commission was $125. Three weeks later, the price of the stock was $22.50 a share, so he bought the 500 shares. The commission was $115. He returned a stock certificate for 500 shares to the broker. Rates of return?

"jake’s roof repair has provided the following data concerning its costs: fixed cost per month cost per repair-hour wages and salaries $ 20,900 $ 15.00 parts and supplies $ 7.70 equipment depreciation $ 2,800 $ 0.35 truck operating expenses $ 5,720 $ 1.60 rent $ 4,690 administrative expenses $ 3,850 $ 0.50 for example, wages and salaries should be $20,900 plus $15.00 per repair-hour. the company expected to work 2,600 repair-hours in may, but actually worked 2,500 repair-hours. the company expects its sales to be $47.00 per repair-hour. required: compute the company’s activity variances for may."