Sheffield Corp. incurred the following costs for 60000 units: Variable costs Fixed costs $360000 392000 Sheffield has received a special order from a foreign company for 3000 units. There is sufficient capacity to fill the order without jeopardizing regular sales. Filling the order will require spending an additional $4200 for shipping. If Sheffield wants to earn $6000 on the order, what should the unit price be? O $9.93 O $8.00 O $9.40 O $15.93