High-Low Method, Cost Formula:s During the past year, the high and low use of three different resources for Fly High Airlines occurred in July maintenance. The number of airplane flight hours is the driver. The total costs of the three resources and the Airplane Flight Resource Hours Total Cost Airplane depreciation: High 44,000 $ 18,100,000 Low 28,000 s 18,100,000 Fuel: High 44,000 445,896,000 Low 28,000 283,752,000 Airplane maintenance: High 44,000 16,704,000 Low Required: Use the high-low method to answer the following questions. If an answer is zero, enter "O". If required, round 1. What is the variable rate for airplane depreciation? 28,000 12,480,000