Samson Inc. expects to sell 10,000 barbells for $18.00 each. Direct materials costs are $5.00, direct manufacturing labour is $6.00, and manufacturing overhead is $2.50 per barbell. Each barbell requires 6 kilograms (kg) of material which is all added at the start of production. The units in work-in-process beginning and ending inventory were half complete as to direct labour and manufacturing overhead costs; the units in beginning inventory are completed before new units are started.. Each barbell requires one-quarter hour of direct labour, and manufacturing overhead is allocated based on direct labour hours. Marketing costs are $2.00 per barbell. The following inventory levels are expected to apply to 2016: Beginning inventory. Ending inventory. Direct materials 500 kg 800 kg Work-in-process inventory 100 units 200 units Finished goods inventory 200 units 150 units