Cost Classification and Estimation Problem 15: Variable and Fixed Cost Byron Corporation has three costs: A, which is variable; B which is fixed; and C, which is semi-variable. The company uses the high-low method and extracted the following data from its accounting records: At 360,000 hours of activity, Cost A totaled P5,220,000 At 280,000 hours, the low point during the period, Cost C totaled 2,996,000; at 400,000 hours, the high point, Cost C's fixed portion amounted to P1.75 per hour. At 320,000 hours of activity, the sum of Costs A, B and C amounted to P16,324,000. Required: 1. Compute the variable portion (total) of Cost C at 280,000 hours of activity. 2. Compute Cost C (total) at 320,000 hours of activity. 3. Compute the Cost B (total) at 320,000 hours of activity