High Low Method (15 total Points) Electrical costs at one of R Company's factories are listed below. Use the high/low cost estimation method to determine the expected cost for December if 600 Machine-Hours are used. 3 1 2 3 4 5 Month Machine-Hours Electrical Cost March 413 $ 7,371 April 506 $ 7,740 May 435 $ 7,447 June 486 $ 7,660 July 499 $ 7,704 August 461 $ 7,563 September 467 $ 7,571 October 458 $ 7,522 November 425 $ 7,403 December 7 1 2 3 4 5 5 7 3