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 196,000 hours of activity, cost a totaled $2,642,000. at 110,408 hours, the low point during the period, cost c totaled $1,514,000; at 216,000 hours, the high point, cost c's fixed portion amounted to $2.00 per hour. at 144,000 hours of activity, the sum of costs a, b, and c amounted to $8,194,000. required: a. compute the variable portion (total) of cost c at 110,408 hours of activity. b. compute cost c (total) at 144,000 hours of activity. c. compute cost b (total) at 144,000 hours of activity.