Tammie Makes $150 a Day as a Bank Clerk

Tammie makes $150 a day as a bank clerk.She takes off two days of work without pay to fly to another city to attend the concert of her favorite music group.The cost of transportation for the trip is $250.The cost of the concert ticket is $50.The opportunity cost of Tammie's trip to the concert is:

A) $300.
B) $450.
C) $500.
D) $600.
Tammie gave up two days of work ($300) plus $250 + $50.Her opportunity cost was the sum of this,or $600.