our manager notes that you calculated the multifactor productivity for April as 4.81. She asks you what that means.

You reply:

a. "For every $4.81 in revenue, we cover all labor, overhead and material costs."

b. "For every $1 in revenue, we produce 4.81 units."

c. "For every $1 spent in operations, we produce 4.81 units."

d. "Every hour, our total costs per unit is $4.81 on average."

e. "Every 4.81 hours, we generate 1 unit."