Help needed please. I did this but I'm not sure the answer is correct can someone please confirm if it's correct please. Thank you ?

Saved 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 192,000 hours of activity, Cost A totaled $2,634,000. . At 121,170 hours, the low point during the period, Cost C totaled $1,510,000; at 212,000 hours, the high point, Cost C's fixed portion amounted to $1.75 per hour. . At 148,000 hours of activity, the sum of Costs A, B, and C amounted to $8,186,000. Required: A. Compute the variable portion (total) of Cost C at 121,170 hours of activity. B. Compute Cost C (total) at 148,000 hours of activity. C. Compute Cost B (total) at 148,000 hours of activity. For all requirements, do not round intermediate calculations. Round your final answers to the nearest dollar amount. A. Variable portion of Cost C $ 212,048 . Total of Cost C $ 1,510,000 C. Total of Cost B $ 1,114,000