The following offsets taken at every 15 m intervals from a survey line to an irregular boundary line are 3.50, 4.30, 6.75, 5.25, 7.50, 8.80, 7.90, 6.40, 4.40, and 3.25 m. Calculate the area enclosed between the survey line, the irregular boundary line, and the first and last offsets by trapezoidal rule.