(Table: Total Cost Data for Pool Cleaning Firm) Use Table: Total Cost Data Table: Total Cost Data for Pool Cleaning Firm. What is the fixed cost for this pool cleaning firm? Table: Total Cost Data for Pool Cleaning Firm Number of Pools Variable Cost (VC) Total Cost (TC) 0 $0 $50 1 50 100 2 70 120 3 100 150 4 140 190 5 240 6 250 300 7 320 370 a) $40 b) $50 c) $100 d) $70