Sebastian needed to buy new tires for his car. The tire shop was running a holiday deal that allowed customers to buy three tires and get the fourth tire for $5. If the total price for all his tires was $237.50, what was the cost of each of the first three tires?
Let X be the cost of the first three tires.
The fourth tire costs X + $5.
Sebastian bought 3 tires at X dollars each for a total cost of 3X dollars.
The total cost of the fourth tire is $5.
Thus, the overall cost is 3X + $5 = $237.50
Therefore, the cost of each of the first three tires is X = ($237.50 - $5)/3 = $232.50/3 = $<<232.50/3=77.50>>77.50. Answer: \boxed{77.50}.