Knowledge Check 01 Part 1 of 2 January 0 500 400 100 Beginning inventory Units produced Units sold Ending inventory 0.07 points 01:52:47 Excerpt from Wallis Corporation eBook References Selling price Direct materiale Direct labor Variable manufacturing overhead Variable selling and administrative expenses Pixed manufacturing overhead Taxed selling and administrative expenses por Unit Per Month $ 100 30 20 10 2 $10,000 3,000 What is the company's contribution margin for January $200 $13,200 $26.800 $40,000