Part IV-Problems (55 points) A. Highestec, Inc is beginning the production of a new product. Management believes that 500 labor hours will be required to complete the new unit. A 90 percent cumulative average-time learning curve model for direct labor hours is assumed to be valid. Data on costs are as follows: S50,000 per unit s20 per direct labor hour $30 per direct labor hour Direct materials Direct labor Variable manufacturing overhead Required: a. Set up a table with columns for cumulative number of units, cumulative average time per unit in hours, and cumulative total time in hours using the cumulative average-time learning curve. Complete the table for , 2., 4, und 8 units. b. Set up a similar table assuming an 80 percent cumulative average-time learning curve. c. What is the difference in variable cost of producing four units