Asking for any advice as I can't really follow the main bus website 
I need to get a bus from Edinburgh Zoo (well,a hotel just next to it) to Waverley train station and then return with an extra adult and child.
If I am reading the website correctly it's the 12 or 31?
I think it would be cheaper for me to get a day pass on my phone, but I'm not sure how much a single journey ticket will be (I know we need the exact change) - but surely that would be cheaper than another day ticket?
Can anyone advise please? 