Bellfont Company produces door stoppers. August production costs are below: Door Stoppers produced 78,000 Direct material (variable) $20,000 Direct labor (variable) 40,000 Supplies (variable) 20,000 Supervision (fixed) 28,200 Depreciation (fixed) 21,900 Other (fixed) 4,400 In September, Bellfont expects to produce 100,000 door stoppers. Assuming no structural changes, what is Bellfont's production cost per door stopper for September