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