Misty runs out of gas 2 blocks from 3 gas stations. She is running late for a hair appointment that was scheduled for 10 minutes ago. Her tank can hold 12 gallons. She has $85, but needs to also use it for her hair appointment. Gas station A has free car service to wash windows and charges $2. 67 per gallon. Gas station B charges $2. 60 per gallon with no extra services. Gas station C has free air and charges $2. 62 per gallon. What is the cheapest cost to fill Misty's tank?