Suppose That on Monday the Cost of Inputs Sums to $1000

Multiple Choice

Suppose that on Monday the cost of inputs sums to $1000, and the value of outputs sums to $4000. For which of the following values on Tuesday would productivity increase?

A) inputs = $1100, outputs = $4000
B) inputs = $1100, outputs = $4200
C) inputs = $850, outputs = $3600
D) inputs = $1000, outputs = $3900
E) inputs = $2000, outputs = $8000