for the fixed cost I have gotten answers including 9943 as well as 9613 and none of them are correct.

please help

roblem 6-42 Continuation of Preceding Problem; Computing Least-Squares Regression Estimates; Comparing Multiple Methods (Appendix) (LO 6-1, 6-2, 6-5, 6-6, 6-9) The following information applies to the questions displayed below.] 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 stuc 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 unloaded) 2,000 1,800 1,500 1,200 2,400 2,600 2,200 2,000 2,800 1,300 1,400 1,600 Material Handling Department Costs $11,900 11,500 11,350 10,400 11,300 12,850 12,200 11,600 12,360 11,150 11,550 11,550 blem 6-42 Part 2 Complete the least-squares regression equation for the department's costs. (Do not round intermediate calculations. Round iable cost per unit to 2 decimal places and other answer to the nearest whole dollar amount.) Answer is complete but not entirely correct. tal monthly cost $ 9,943 X + $ 0.89 per unit of activity