The following table indicates the demand schedules for four types of consumers: A, B, C, and D and the number of consumers in each group (top row). The quantity demanded by each type of consumer (QA, QB, Qc, and QD) is shown for market prices ranging from $10 down to $4. What is the combined quantity demanded at a market price of $6? A. 6,500 OB. 6,400 Market Price $10 9 765186 4 Number of Consumers A = 200 B = 300 QA 0 0 1 2345 QB 0 1 3 5 7 9 11 C = 300 Qc 1 23 4 5 6 7 OC. 384,000 D = 200 QD 1 358152 11 20 O D. 25,000