That paragraph is somewhat incoherent at that point in the article: margins are razor thin — at a price tag of $12,000 per 6 miles or $2,000 per mile.

(Yes, there is some other stuff, much, much, much later that maybe cuts into that …)

The cost isn't about the actual mileage though, it's having two paramedics each earning about 100k/yr per ambulance, while having coverage 24x7x365. So fully loaded, the labor for one ambulance might be in the high six figures to seven figures.