O'Keefe Company, which has only one product, has provided the following data concerning its most recent month of operations: $93 4,000 3,600 400 Selling Price Units in beginning inventory units produced Units sold Units in ending inventory Direct materials per unit Direct labor per unit Variable overhead per unit Variable selling & administrative per unit Fixed manufacturing overhead Fixed selling & administrative $ 32 $3 $11 $ 24,000 $ 39,600 Based on this information, what is O'Keefe's total contribution margin? [Note: Enter your answer as a whole number with no decimals, commas, or dollar signs. Place a minus sign in front if the answer is a negative number.)