Sand Inc., a company that produces and sells a single product, has provided its contribution format income statement for January. Sales (3,400 units) Variable expenses $68,000 27,880 Contribution margin Fixed expenses 40,120 :51 32,100 8,020 Net operating income If the company sells 3,700 units, its total contribution margin should be closest to: (Do not round intermediate calculations.) Multiple Choice $8,728 $43,660