Cubicle Solutions sells productivity software such as word processors, spreadsheets, and personal information managers. Cubicle prides itself on customer support and maintains a large call center where customers can call in with technical questions about the installation and use of Cubicle products. Monthly data on the number of support calls and call center costs for the last year have been collected and are shown as follows (all activities and costs are in thousands) Month Support Calls Call Center Cost $521 1 40 2 52 660 48 620 4 42 550 5 58 710 6 50 640 7 47 620 8 51 650 54 670 10 43 575 11 45 595 12 44 580 Required: a. Estimate the monthly fixed costs and the unit variable cost per support call using the high-low estimation method. (Round variable cost per unit to 2 decimal places. Enter your answer in thousands of dollars.) Support calls per call Overhead Costs