Answer:
Date General Journal Debit Credit
Dec 31 Supplies expenses $2,300
(1,650+3,800-3150)
Supplies $2,300
(To record the supplies used during the period)
Dec 31 Insurance expenses $1,650
Prepaid expenses $1,650
(To record the insurance expired for December)
Dec 31 Salaries expenses $15,300
Salaries payable $15,300
(To record the unpaid salaries)
Dec 31 Deferred revenue $1,150
(3450/3 months)
Rent revenue $1,150
(To record the revenue earned during the period)