The math ain’t mathing. A round-trip ticket from the Big Apple to catch the FIFA World Cup in Jersey could ring in at $150, according to a new report — up $50 from what was initially floated earlier this week. The latest price tag for NJ Transit tickets — from Penn Station in Manhattan to MetLife Stadium — would mean a more than 1,000% increase from the normal cost of $12.90 for the 18-mile trip. The Athletic, citing an inside source, reported the new possible fare Thursday, a day before the