u/Cheap-Chemist-9558

Hi. I will be hiking in the Dolomites in September, and wondering how bus tickets work in the area? I think I will need to take the following busses:

• 321 Bus from Brixen to Cabinovia Plose
• 54 Bus from Rifugio Castiglioni Marmolada to Malga Ciapela Bivio
• B503 Bus from Passo Cereda to Fiera di Primiero
• B501 Bus from Fiera di Primiero Bus Station to Feltre Station

How can I buy tickets for the Bus? Can I buy directly form the bus driver? Thanks in advance!