Potter and Weasley Co. produces and sells designer cloaks. It has provided the following data concerning its most recent month of operations: Selling Price \\( \\$ 126 \\) Units in Beginning Inventory Variable Costs per Unit The total contribution margin for the month under the variable costing approach is: \\( \\$ 319,200 \\) \\( \\$ 162,600 \\) \\( \\$ 226,800 \\) \\( \\$ 378,000 \\)