This must be a mistake, but take advantage of it while it lasts. The full fare business class roundtrip is $2581+tax, the discounted business is $148? Perhaps this was intended as $1480. (For comparison the discounted Mexicana business class fare departing San Francisco is $2865, from Chicago $2763, and from Newark $2731.)
It’s a non-refundable fare, but without date or time restrictions, the only issue is that discounted business inventory needs for be available for the flights in question.
This won’t last, jump on it if interested.