The weekly production output is 400 units of a product that sells for $20/unit and has variable costs of $16 per unit. Maximum capacity is 500 units per month. Total monthly fixed costs are $800. A special order is received for 100 units at a price of $18 per unit. In deciding whether to accept or reject the order at this price, what should be considered? Select one: The difference between the offered price and the old price per unit. The difference between the offered price and the variable cost per unit. The old fixed cost of $2.00 per unit. The new fixed cost of $1.60 per unit