To follow is information about the units produced and total manufacturing costs for Varied Resources Inc. for the past six months. Month Number of units produced Total manufacturing costs January 8,000 $8,500 February 7,500 $8,000 March 6,600 $7,550 April 6,800 $7,650 4,000 $6.700 June 7,000 $7,750 May Using the high-low method, what is the monthly fixed manufacturing cost? (Round intermediary calculations to the nearest cent. Use the "high" data month to calculate your final answer. Do not use the "low" month, as it will result in an approximation of the cost.) O A. $1,800 O B. $15,200 O C. $4.900 OD. $3,600