Skye Dog Toys is analyzing a proposed project. The company expects to sell 3,100 units, give or take 4%. The expected variable cost per unit is $9 and the expected fixed costs are $5,500. Cost estimates are considered accurate within a plus or minus 2% range. The depreciation expense is $1,000. The sale price is estimated at $22 a unit, give or take 2%. What is the contribution margin under the expected case scenario?