7.43 A company has to decide between two machines that do the same job but have different lives. Net Cash Flow Machine A $40,000 $15,000 $15,000 -$15,000 Machine B -$55,000 $10,000 -$10,000 $10,000 $10,000 Which machine should the company buy, at an interest rate of 10%, based on the principle of internal rate of return? Assume a financing rate of 8%