When the printsummary is called you should do something along the lines of:
orchestraSeats = 0
orchestraMoney = 0
for each item in transactionclubSale
if item.typeString is Orchestra
orchestraSeats += 1
orchestraMoney += item.priceDecimal
Output the orchestraSeats and orchestraMoney
Repeat for Mezzanine, General, etc...
There are more efficient ways of doing this, but that would be the easiest way with your level of programming experience.