6. Martin Company incurred the following costs for 70,000 units: Variable costs $350,000 Fixed costs 392,000 Martin has received a special order from a foreign company for 3,000 units. There is sufficient capacity to fill the order without jeopardizing regular sales. Filling the order will require spending an additional $3,000 for shipping. If Martin wants to earn $12,000 on the order, what should the unit price be? a. $10.00 b. $15.70 c. $8.00 d. $15.10