Ryan Airline Company was an airline founded by T. Claude Ryan and Benjamin Franklin "Frank" Mahoney at San Diego, California on April 19, 1925. They had earlier established a scheduled service between San Diego and Los Angeles with a fare of $14.50 one-way and $22.50 round-trip.
Buying one round trip was cheaper than two one-way trips.
Two one-ways would be $29. My first attempt was very similar but the AI only pegged it at 75% so I changed ticket to trip and I think that was enough to fool the AI.