Rockette, Corp.'s utility costs are listed below: Units Utility Cost January 472 $7,809 February 410 $7,683 March 503 $8,130 April 416 $7,714 May 580 $8,618 Management believes that utility cost is a mixed cost (part variable and part fixed). Using the high-low method, what is the estimate of total utility cost if June activity was 560 units? Numeric Response