Chicago Office Equipment manufactures and sells metal shelving. It began operations on January 1,2017. (Click the icon to view the costs incurred during 2017. (Click the icon to view the inventory data.) is carried at the average unit manufacturing cost for 2017 . Finished-goods inventory at December 31, 2017, was $18,900. Requirements 1. Calculate direct materials inventory, total cost, December 31,2017. 2. Calculate finished-goods invent 4. Calculate operating income for 2017. 4.Calculate operating income for 2017. Data table Data table Variable manufacturing costs are variable with respect to units produced. Variable marketing, distribution, and customer-service costs are variable with respect to units sold