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): Problem 5-68 (Static) Part b 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.)