Answer and Explanation:
The journal entries are shown below:
a.  Insurance expense $275
              To Prepaid insurance $275
(Being the insurance expense is recorded)
b.  Supplies expense $785 ($1,500 - $715)
             To Supplies $785
(Being the supplies expense is recorded)
We assume the balance of supplies before adjustment is $1,500
c. Depreciation - office equipment $330
           To Accumulated depreciation $330
(Being the depreciation expense is recorded)
d. Salary Dr $325
         To Accrued salary $325
(Being the accrued salary is recorded)
e.  Rent expense $1,600
             To Prepaid rent $1,600
(Being the rent expense is recorded)
f. Unearned fees $790
            To Fees revenue $790
(Being the unearned fees is recorded)
We assume the balance of unearned fees before adjustment is $4,000 
So, $790 is come from 
= $4,000 - $3,210
= $790