Problem 6-42 Continuation of Preceding Problem; Computing Least- Squares Regression Estimates; Comparing Multiple Methods (Appendix) (LO 6-1, 6-2, 6-5, 6-6, 6-8) [The following information applies to the questions displayed below.j Martha's Vineyard Marine Supply is a wholesaler for a large variety of boating and fishing equipment. The company's controller, Mathew Knight, has recently completed a cost study of the firm's material-handling department in which he used work measurement to quantify the department's activity. The control factor unit used in the work-measurement study was hundreds of pounds of equipment unloaded or loaded at the company's loading dock. Knight compiled the following data. Month January February March April May June July August September October November December Units of Activity (hundreds of pounds of equipment loaded or unloadea) 2,600 2,400 2,100 1,800 3,000 3,200 2,800 2,600 3,400 1,900 2,000 2,200 Material- Handling Department Costs $12,500 12,100 11,650 11,000 11,900 13,750 12,800 12,200 13,080 11,450 12,150 12,150 1. Compute the least-squares regression estimate of the variable- and fixed-cost components in the company's material-handling department costs. (Do not round intermediate calculations. Round "Variable-cost component" to 2 decimal places and other answer to the nearest whole dollar amount.) Fixed-cost component Variable-cost component 2. Complete the least-squares regression equation for the department's costs. (Do not round intermediate calculations. Round variable cost per unit to 2 decimal places and other answer to the nearest whole dollar amount.) Total monthly cost- per unit of activity 3. Predict the firm's material-handling department's costs for a month when 2,650 units of activity are recorded. (Do not round intermediate calculations. Round variable cost per unit to2 decimal places and final answer to the nearest whole dollar amount.) Total monthly cost