A product costs $10 per piece to be produced in house. It costs $20 per piece when purchased from an outside vendor. The fixed cost of in-house production is $30 , 000 per year. The following must be true: If the annual demand exceeds 3000 it will be cheaper to produce in-house. If the annual demand exceeds 2,500 it will be cheaper to produce in-house. None of the other choices. If the annual demand exceeds 2,500 it will be more expensive to produce in-house