Spreadsheet What is a grocery store's contribution margin (CM) if the average purchase price is $86.55 per visit, the customer delection rate is 0.10, the VLC IS $1,800, and 52 purchases are made per year? Use a trial and error approach with the Excel template VLC to find your answer. Round your answer to the nearest whole number A factory produces 10.000 desk staplers each week. The equipment used costs $50,000 and will remain productive for three years. The labor cost per year is $180,000 a. What is the productivity measure of units of output per dollar of Input" averaged over the three year period? Assume that there are 52 weeks per year. Round your answer to two decimal places units of output per dollar input b. We have the option of buying $80,000 of new equipment, with an operating te of sx years. It would reduce labor costs to $104,000 per year. Should we consider purchasing this equipment (using productivity arguments alone) Assume that there are 52 weeks per year. Round your answer for productivity to two decimal places For the newer machine, the productivity is units of output per dollar input. Because the productivity of the new machine is higher It would be a pood Investment