of Sevenler A.. has collected the following monthly cost data for use in analyzing the cost behaviour of electricity costs. Units Produced Total Cost (TL) July 300 26,500 August 350 30,000 September 450 I 36,000 October 600 45,000 November 380 32,000 December 650 48,000 on Using the High-Low method, you have calculated that variable electricity cost is TL 60/unit. What is your best estimate of monthly fixed cost? a. TL 11,000 b. TL 9,000 CTL 8,000 X d. TL 6.000