A country club usually only allows members to purchase tickets for its celebrity golf tournament, but the club is considering allowing non-members to purchase tickets this year. The demand and supply schedules are as follows:
Price Quantity Demanded Quantity Demanded Quantity Supplied
by members by non members
$10 1000 500 600
$15 800 400 600
$20 600 300 600
$25 400 200 600
$30 200 100 600
If both members and non-members are allowed to purchase tickets to this year's celebrity golf tournament, then what will be the equilibrium price?
a. $10
b. $15
c. $20
d. $25