Some Mixed Cost and Activity level data : Month Activity Volume Maintenance (patient-days) Cost Incurred January 19,000 $6,900 February 17,100 18,500 March 5,000 7,450 April 16,500 8,200 17,300 19,070 Dune 18,000 19,800 July 16,200 17,800 August 7,200 18,600 September 6,100 18,000 October 19,500 7,950 May Using the High-Low method, compute: . the variable cost per unit; the fixed cost; and then express the costs in equation form Y= a +bX