I did say I wasn't sure if it was accurate. I suspect that is probably the total cost to buy, store, apply etc etc. Either way its a **** load of money. A quick google search showed me standard pavement grit was £150 + VAT a ton and I recall reading that the airport recommended was many multiples more expensive due to chemical addatives.
Anyway, my point was just wondering if they looked at arrivals and departures and thought "nah, too pricey".