Tried and True’s accountant (from Problem 1.1) suggests that monthly rent and hourly wage rate also be factored into the productivity calculations. Annandale pays the highest average wage at $10 an hour. Blacksburg pays $7.25 an hour, Charlottesville $8, and Danville $7.50. The cost to rent store space is $2800 a month in Annandale, $1200 a month in Blacksburg, $2000 a month in Charlottesville, and $800 a month in Danville.

a. Which store is most productive?

b. Tried and True is not sure it can keep all four stores open. Based on multifactor productivity, which store would you close? What other factors should be considered?