You are considering two machines for next year's production. Option A has a fixed cost of $63,000 per year plus a variable cost of $30 per unit. Option B has a fixed cost of $177,500 per year and a variable cost of $14 per unit. Above what number of units produced per year would Option B become preferable to Option A? (use average total cost/unit) Round up to next whole unit. Insert your answer in the space below as