Oil pipeline will cross 16.8 miles of the national forest which is 88,702 feet (16.8 * 5280) and the width of the pipeline is 200 feet. This creates a rectangular area of 17,740,400 square feet (200*88702). 1 acre equals to 43,500 square feet so the oil pipeline creates 407.82 acres (17,740,400 / 43,500). Company is charged 32 dollars per acre by the Forest Service, the company used 407.82 acres in total so the total charged amount is 13,050.24 dollars (407.82 * 32).