At price Pmin,airlines would like to supply Q2,well above the quantity Q that consumers will buy.Here they supply Q3. Trapezoid()D is the cost of unsold output.Airline profits may have been lower as a result of regulation because triangle C and trapezoid D can together exceed rectangle A. In addition,consumers lose A+B.At price Pmin, airlines would like to supply Q2 , well above the quantity Q1 that consumers will buy. Here they supply Q3 . Trapezoid(梯形)D is the cost of unsold output. Airline profits may have been lower as a result of regulation because triangle C and trapezoid D can together exceed rectangle A. In addition, consumers lose A + B