Transaction Entries and Adjusting Entries Deluxe Building Services offers janitorial services on both a contract basis and an hourly basis. On January $1,$ ?Deluxe collected $$42,000$ ?in advance on a six$-$month contract for work to be performed evenly during the next six months.

a$.$ ?Provide the general journal entry on January $1$ ?to record the receipt of $$42,000$ ?for contract work.

b$.$ ?Provide the adjusting entry to be made on January $31$ ?for the contract work done during January.

c$.$ ?At January $31,$ ?a total of $40$ ?hours of hourly rate janitor work was unbilled. The billing rate is $$25$ ?per hour. Provide the adjusting entry needed on January $31.($Note: The firm uses the account Fees Receivable to reflect amounts due but not yet billed.$)$