A human has the choice to spend 13 hours working or learning. If they spend an hour working, they earn $10. If they spend an hour learning, then they can expect to progress through 5 course concepts. What is their opportunity cost if they change from working 7 hours and learning 6 hours, to working 5 hours and learning 8 hours?

Group of answer choices

they forgo $29, and learns another 14 course concepts

they gain $7, and learns another 3 course concepts

they forgo $20, and learn another 10 course concepts

they forgo $8, and learns another 12 course concepts