elton, inc., expects to sell 6,000 ceramic vases for $20 each. direct materials costs are $2, direct manufacturing labor is $10, and manufacturing overhead is $3 per vase. the following inventory levels apply to 2016: beginning inventory ending inventory direct materials 1,000 units 1,000 units work-in-process inventory 0 units 0 units finished goods inventory 400 units 500 units how many ceramic vases should be produced in 2016?