Answer:
Dr. Cash $2,200
Cr. Unearned revenue $2,200
Explanation:
As the entry fee for the the racing event is received in advance. The event is on December 15 and the entry fee is received earlier to decide the participants of the race. This receipt is not considered as the revenue income until the event held and race is over. The unearned revenue is considered as the liability and recorded in unearned revenue account as action from the tony side is due. as Tony completes action which is the racing event, the revenue will be recorded.