Problem 1-8 Points Digby Company manufactured and sold 37,000 units of its product at a price of se3 per unit. Total variable cost per unit is $60, consisting of $58 in variable production cost ana 2arble selling and administrative cost. Fixed costs of manufacturing are $350,000. a. Compute the total contribution margin under variable costing. b. Compute the contribution margin per unit based on this data c. Compute the gross margin per unit under absorption costing. d. Compute the total gross margin