4. Calvin's Cleaning has employed you to investigate whether any accrual entries are needed in the business. On completion of your investigation on 30 June, you have discovered that the following items need attention. - Employee salaries owed but not recorded, $6400 Interest revenue accrued but not recorded, $1600 Services provided but unrecorded totalled $2,600 REQUIRED: Prepare the adjusting entries for items 1 to 3 at 30 June, the end of the accounting period.