Really Fast Delivery Services has collected the following information about operating expenditures for its delivery truck fleet for the past five years: Year Miles Operating Costs 2013 110,000 $390,000 2014 140,000 $420,000 2015 100,000 $360,000 2016 130,000 $410,000 2017 170,000 $450,000 What is the best estimate of total operating expenses for 2018 using the high-low method based on total expected miles of 120,000? (Round up to dollar, and choose the closest number.)