most are on franchise. so it is down to the owner of that franchise, or at least in this area it is... Quoted on a McD a few years ago as a friends son works there. The manager nearly fainted when we told him our price and when we asked why he wanted to change his "old" wc's he said they were unreliable, they charged him less than half what we had quoted so what did he expect. :
If you get to quote, be ready for time restrictions (this one said before 08:00) when they say windows they mean ins and outs (loads of grease) framework and plastic panels, door handles, serving hatches at drive through areas and the list goes on and on