A hamburger factory produces 70,000 hamburgers each week. The equipment used costs $14,000 and will remain productive for four years. The labor cost per year is $10,000. a. What is the productivity measure of "units of output per dollar of input" averaged over the four-year period? Assume that there are 52 weeks per year. Round your answer to one decimal place. Productivity: hamburgers/dollar are 52 weeks per year. Round your answer for productivity to one decimal place. For the cheap machine, productivity is hamburgers/dollar input. Because the productivity of the cheap machine is , it would be a investment based on this single criterion