Use the following information for both Question 11 and 12. Rockette, Corp.'s utility costs are listed below: Units Utility Cost January 602 $8,334 February 565 $7,792 March 628 $8,074 April 650 $8,169 May $8,823 June 560 $7,500 July 647 $8,953 August 778 $9,366 September 800 $9,900 October 684 $8,710 November 661 $8,851 December $7,791 709 579 Management believes that utility cost is a mixed cost (part variable and part fixed). Using the high-low method, answer the following two questions. 11. What is the estimate of Rockette's monthly fixed cost for utilities? 12. What is the estimate of total utility cost if a month's activity was 700 units