What is the total market supply, Qs, for luxury sports cars in the United States if the only three suppliers inverse supply functions are P = -10 + 5Qs1, P = 20 + 5Qs2, P = 5Qs3?
A) P = 10 + 21Qs
B) Qs = -2 +P/15
C) Qs = 6 + P/15
D) Qs = -2 + P/15
ANSWER
B
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