Suppose that Sam has been given a ticket to a Lana Del Rey concert. The ticket cannot be sold or traded. Meanwhile, on the same night, in the same town, Lady Gaga is playing. A ticket to see Lady Gaga costs $70, and Sam places a value of $95 on seeing Lady Gaga perform. There are no other alternative activities. Sam's opportunity cost for seeing Lana Del Rey is:

Question 6 options:

$0

$25

$70

$95