Hatfield Corporation, which has only one product, has provided the following data concerning its most recent month of operations: Selling price $123 Units in beginning inventory 0 Units produced 6,400 Units sold 6,100 Units in ending inventory 300 Variable costs per unit: Direct materials $45 Direct labor $30 Variable manufacturing overhead $1 Variable selling and administrative $8 Fixed costs: Fixed manufacturing overhead $140,800 Fixed selling and administrative $91,500 The total contribution margin for the month under variable costing is:

a.) $237,900

b.) $97,100

c.) $152,500

d.) $286,700