Fruit boat company manufacturers 10 fruit themed boats per month. A navigation system is included in each boat. Fruit Boat COmpany manufacturers the navigation system in-house but is considering the possiblity of outsourcing thsi function. At present, the variable cost per unit is $300, and the fixed costs are $39,000 per month. If it outsources the naviagation system, fxed costs could be reduced by half, and the vacant facilitiescould be rented out to earn 400 per month of rental income. What is the maximum contract cost that Fruit Boat Company should pay for outsourcing?

a. any cost lower than $3900 per unit
b. any cost lower than $2325 per unit
c. any cost lower than $2225 per unit
d. any cost lower than $275 per unit