Answer:
<u>1. oír</u>
<u>2.asistir</u>
<u>3. ver</u>(Without "interesante" you'd use jugar instead of ver. Try not to get confused)
<u>4.pagar</u>(I think, I didn't really understand either word in the sentence :/)
Antes de ir a la universidad tienes que graduarte de la escuela.
Hope it helped.
The number could be 37,41,43 or 47 sand dollars.