The following table shows the demand and supply schedules for compact discs (CD) for a month. _ Household Market demand Individual supply Market supply demand 2.00 20 30 2.50 I8 40 3.00 IS 50 3.50 I2 55 4.00 lo 60 4.50 7 68 There are 50 households purchasing and IS sellers selling the CD5 in the market