CH7 AP. HENR Inc. sells mechanical parts for $9 per unit. The unit cost of each part follows: Direct materials $1.50 Direct labor 2.20 Manufacturing overhead 2.10 Total $5.80 An order to purchase 4,000 gears was recently received from a new customer. There is enough capacity to fill the order and filling this order would not disrupt current operations. HENR Inc. would incur an additional $1.80 per part for shipping costs. Half of the manufacturing overhead costs are fixed and would be incurred no matter how many units are produced. In negotiating a price, how much is the minimum acceptable selling price? O $4.75 O $7.60 $5.80 O $6.55