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. The following data were collected from last year's operations (revenues and costs in thousands of dollars). Store Revenues Costs 101 $4,290 $4,499 102 2,417 3,274 103 6,023 5,466 104 4,362 4,473 105 3,199 4,246 106 4,403 3,984 107 7,084 5,314 108 2,064 3,324 109 6,366 5,448 110 3,798 3,529 111 4,266 4,654 112 5,165 3,580 113 3,742 3,126 114 5,577 5,035 115 3,074 3,271 Required a. Use the high-low method to estimate the fixed and variable portions of store costs based on revenues. b. Managers estimate that one of the proposed stores will have revenues of $4.4 million. What are the estimated monthly overhead costs, assuming no inflation? c. Managers are also considering a mega-store" with revenues of $29 million. What are the estimated monthly overhead costs, assuming no inflation? Complete this question by entering your answers in the tabs below. Required A Required B Required C Use the high-low method to estimate the fixed and variable portions of store costs based on revenues. (Round variable cost percentage answer to 1 decimal place. Enter fixed cost answer in thousands of dollars.) Variable cost Fixed cost %