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Davis Stores sells clothing in 15 stores located around the southwestern United States. The managers at Davis are considering expanding by opening new stores and are interested in estimating costs in potential new locations. They believe that costs are driven in large part by store volume measured by revenue. During a discussion, one of the managers suggests that number of employees might be better at explaining cost than store revenues. As a result of that suggestion, managers collected the following information from last year's operations (revenues and costs in thousands of dollars) Store 101$ 102 103 104 105 106 107 108 109 110 111 112 113 114 115 Costs 4,214 2,894 5,181 3,998 3,676 3,319 5,029 2,374 4,688 2,959 4,179 3,200 2,556 4,655 2,986 Employees 395 29 47 38 33 38 54 26 44 35 37 41 35 42 28 Revenues 4,100 2,227 5,738 3,982 2,914 4,023 6,894 1,779 5,416 3,228 3,886 4,690 3,552 4,817 2,124 Required a. Use the high-low method to estimate the fixed and variable portions of store costs based on employees. (Do not round your intermediate calculation. Negative amounts should be indicated by a minus sign. Round your answer to the nearest whole number (in thousands of dollars).) Answer is not complete. $ 133 6666 Variable cost (per employee) Fixed cost b. Use the results of your high-low analysis to estimate the cost for a store with 30 employees. (Do not round your intermediate calculation. Enter your answers in thousands of dollars.) Store cost