You purchase 80 shares for $70 a share ($5,600), and after a year the price rises to $80. Calculate the percentage return on your investment if you bought the stock on margin and the margin requirement was 50% . (ignore commissions, dividends, and interest expense): Round your answer to one decimal place.

You are considering the purchase of one of two machines used in your manufacturing plant. machine 1 has a life of two years, costs $20,000 initially, and then $4,000 per year in maintenance costs. machine 2 costs $25,000 initially, has a life of three years, and requires $3,500 in annual maintenance costs. either machine must be replaced at the end of its life with an equivalent machine. using eac which is the better machine for the firm