bellfront company produces door stoppers. august production costs are below. door stoppers produced $71000 direct material (variable) $20000 direct labor (variable) $40000 supplies (variable) $20000 supervision (fixed) $25200 depreciation (fixed) $21600 other (fixed) $4000 in September, bellfront expects to produce 100000 door stoppers. Assuming no structural changes, what is bellfront production cost per door stopper for September?