Final answer:
The journal entry for Nightowl Cleaners receiving ₱780,000 for an advertising contract would be a credit to Unearned Advertising and a debit to Cash.
Step-by-step explanation:
The journal entries for the given transactions can be recorded as follows:
Account NameDebit (+)Credit (-)Unearned Advertising₱780,000Cash₱780,000
Explanation: Nightowl Cleaners received ₱780,000 for the advertising contract, which is a liability for the company as the services are not yet provided. Therefore, the amount is recorded as a credit in the Unearned Advertising account, and a debit is made to the Cash account to reflect the increase in cash.