T.L. Franklin Corporation has three costs: A, which is variable; B, which is fixed; and C, which is semivariable. The company uses the high-low method and extracted the following data from its accounting records: At 180,000 hours of activity, Cost A totaled $2,610,000. At 140,000 hours, the low point during the period, Cost C totaled $1,498,000; at 200,000 hours, the high point, Cost C's fixed portion amounted to $1.75 per hour. At 160,000 hours of activity, the sum of Costs A, B, and C amounted to $8,162,000. Required: A. Compute the variable portion (total) of Cost C at 140,000 hours of activity. B. Compute Cost C (total) at 160,000 hours of activity. C. Compute Cost B (total) at 160,000 hours of activity.

We need the complete and elaborated calculation for each requirement, please.