Suppose That on Wednesday the Cost of Inputs Summed to $4000

Multiple Choice

Suppose that on Wednesday the cost of inputs summed to $4000, and the value of outputs summed to $10,000. For which of the following values on Thursday will productivity stay the same?

A) inputs = $2000, outputs = $5000
B) inputs = $5000, outputs = $10,000
C) inputs = $4000, outputs = $8000
D) inputs = $10,000, outputs = $4000
E) inputs = $12,000, outputs = $40,000