Mercier's Is Analyzing a Proposed 3-Year Project Using Standard Sensitivity

Mercier's is analyzing a proposed 3-year project using standard sensitivity analysis.The company expects to sell 12,000 units,±4 percent.The expected variable cost per unit is $7 and the expected fixed costs are $36,000.The fixed and variable cost estimates are considered accurate within a ±6 percent range.The sales price is estimated at $14 a unit,±5 percent.The project requires an initial investment of $90,000 for equipment that will be depreciated using the straight-line method to zero over the project's life.The equipment can be sold for $39,000 at the end of the project.The project requires $11,200 in net working capital for the three years.The discount rate is 11 percent and tax rate is 34 percent
What is the contribution margin for a sensitivity analysis using a variable cost per unit of $8?

A) $3
B) $4
C) $5
D) $6
E) $7