Go on greyhound.com and exlore. Its usually cheaper on a Tuesday or Thursday. Also check to see if it's cheaper to purchase to LA or Pheonix and then another to Amarillo. I paid $148 to LA and $118 from LA to Joplin, MO
From where? If you book early its cheaper and make sure its not a holiday weekend
Depends on when you want to leave, if adult fare, ECT. But it's at least $260 for 1 adult
It might be well over $200. Call Greyhound to make sure
Call and find out
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