A builder takes one hour in total to travel to and from his job. He works $40$ hours each week for $\$200$. He is offered the option of working $50$ hours a week for an additional $\$75$. What is the opportunity cost to the builder of doing the extra hours?
- Athe ability to increase his purchasing power
- Bthe additional time travelling to and from work
- Cthe increased hourly earnings of $\$7.50$
- Dthe ten hours of leisure time