Question: The Fisheries company shipped 6,000 tons of halibut at a cost of $5,800 in March, and 9,000 tons for $8,200 in April. Assuming that this activity is within the relevant range, the expected shipping cost for shipping 7,800 tons would be:
a. $6,510
b. $9,750
c. $6,460
d. $6,420