Last month, the entity produced and sold 2,000 units of Product, with an $8 per unit selling price. Before it can be sold, additional processing costs of $2 per unit and selling costs of $1 per unit must be incurred. A joint product has a relative sales value at split-off of $490,000. Joint costs for the month were $300,000. If Product is accounted for as a main product, what was the gross profit from its sale?

A. 16,000

B. 4,000

C. 6,000

D. 10,000