After clearing and grubbing an 9,000 square foot area, an extra 4 inches of fill will be required over the amount of the original estimate. The fill costs $5.00 per cubic yard. What is the cost of the extra fill?

After clearing and grubbing an 9,000 square foot area, an extra 4 inches of fill will be required over the amount of the original estimate. The fill costs $5.00 per cubic yard. What is the cost of the extra fill?