Final answer:
The price of the sleeper fare is found by adding the additional cost of $258 to the coach fare of $180, which sums up to $438.
Step-by-step explanation:
To find the price of the sleeper fare, we need to calculate the additional cost on top of the coach fare, which is already provided. According to the question, the sleeper fare is $258 more than the coach fare. Since the coach fare is $180, we simply add $258 to this amount to find the sleeper fare.
$180 (coach fare) + $258 (additional cost) = $438 (sleeper fare).
Therefore, the price of the sleeper fare is $438.