Given the following adjusted trial balance:


Debit Credit
Cash $931
Accounts receivable 1175
Inventory 1749
Prepaid rent 48
Equipment
170
Accumulated depreciation-equipment
$29
Accounts payable 46
Unearned service revenue
68
Common stock 120
Retained earnings 3700
Service revenue 206
Interest revenue 31
Salaries and wages expense
90
Travel expense 37
Total $4200 $4200

After closing entries have been posted, the balance in retained earnings will be: