Answer:
Date Account Title Debit Credit
March 1 Cash $7,500
Unearned Revenue $7,500
Date Account Title Debit Credit
July 31 Unearned Revenue $7,500
Design Services Revenue $7,500
In March the revenue had not been earned as the work had not been carried out so the revenue will be sent to the Unearned revenue account.
When the designer finishes in July, they can now recognize the revenue so it will be moved from the Unearned revenue account to the proper revenue account.