Answer:
Season tickets sold = $1,819,000 / $340
Season tickets sold = 5,350 tickets
Games played by the end of October = [$1,284,000 / ($1,819,000 / 17 games)]
Games played by the end of October = $1,284,000 / 107,000
Games played by the end of October = 12 games
Journal Entry to record initial sale of ticket
Accounts title Debit Credit
Cash $1,819,000
Unearned Ticket revenue $1,819,000
Journal Entry to record first home game revenue
Accounts title Debit Credit
Unearned Ticket revenue $107,000
Ticket revenue (earned) $107,000