A company produces a single product. Variable production costs are $21 per unit and variable selling and administrative expenses are $4 per unit. Fixed manufacturing overhead totals $30,000 and fixed selling and administration expenses total $36,000. Assuming a beginning inventory of zero, production of 6,000 units and sales of 5,600 units, the dollar value of the ending inventory under variable costing would be: O $8,400 O $14,400 O $12,000 O$10,000