In the figure above, at the point where the price is $50 per bunch, the price elasticity of supply is

A ticket to a concert costs $45 . You have a ticket and can resell it for $75 . Your opportunity cost of actually attending the concert is

a. $30. b. $45. c. $75. d. $120.

When Mary earned $3,200 per month, she bought 2 concert tickets each month. Now her monthly income is $5,600, and the number of concert tickets she purchases has risen to 3 per month. Mary's income elasticity of demand for concert tickets equals ________ and the tickets are a(n) ________ good for Mary.

A. -0.21; inferior B. +0.73; normal C. -1.36; normal D. +0.21; complementary