Mayes Company records all prepayments in income statement accounts. At April 30, the trial balance shows Supplies Expense $2,800, Service Revenue $9,200, and zero balances in related balance sheet accounts. Prepare the adjusting entries at April 30 assuming: (Credit account titles are automatically indented when the amount is entered. Do not indent manually.) (a) $700 of supplies on hand and (b) $3,000 of service revenue should be reported as unearned.