Sparkling Water Offers Pool and Spa Cleaning Services to Hotels

Sparkling Water offers pool and spa cleaning services to hotels and residential customers. Commercial (hotels) customers pay on a monthly contract basis, while residential customers pay an hourly rate based on services provided.
In July, Sparkling Water signed a 6-month contract with Hilton Holidays to provide pool and spa cleaning services for 3 hotel sites. The contract price of $24,000 was collected on July 1. The services will be provided evenly over the 6 months.
During July, Sparkling Water also provided 80 hours of residential pool services at $15 per hour. These services have not yet been billed to residential customers. The company uses the account, Fees Receivable, to reflect amounts due but not yet billed.
Determine the financial statement effect of each of the following transactions/adjustments:
a. The July 1 receipt of $24,000 cash related to the contract with Hilton Holidays.
b. Adjustment to be made on July 31 for the contract work performed for Hilton Holidays during the month.
c. The adjustment needed on July 31 to reflect the residential pool services performed during the month.