The accounting records of Zodiac Inc. include the following unadjusted balances at January 31: As Zodiac's accountant, you have developed the following data for the January 31 adjusting entries: Accounts Receivable $2250 Supplies $700 Salaries Payable $0 Unearned Service Revenue $850 Service Revenue $14100 Salaries Expense $4800 Supplies Expense $0 Supplies on hand, $250 Salary owed to employees, $1800 Service revenue accrued, $850 Unearned service revenue that has been earned $750 Calculate the salaries expense for January