Answer:
1 Oct.31 
Dr Supplies expense $2,460
 Cr Supplies $2,460
2. Oct.31
Dr Insurance Expense $100
Cr Prepaid insurance $100
3. Oct.31 
Dr Depreciation expense $50 
Cr Accumulated depreciation $50
 
4 Oct.31
Dr Unearned revenue $600 
Cr Service revenue $600
 
5 Oct.31 
Dr Accounts receivable $300 
Cr Service revenue $300
 
6 Oct.31
Dr Interest expense $95 
Cr Interest payable $95
 
7 Oct.31
Dr Salaries expesne $1,625 
Cr Salaries payable $1,625
Step-by-step explanation:
Preparation of the adjusting entries
1 Oct.31 
Dr Supplies expense $2,460
 [2,960-500] 
Cr Supplies $2,460
[Being To record supplies expense] 
2. Oct.31
Dr Insurance Expense $100
Cr Prepaid insurance $100
[Being To record insurance expense] 
3. Oct.31 
Dr Depreciation expense $50 
Cr Accumulated depreciation $50
[Being To record depreciation expense] 
4 Oct.31
Dr Unearned revenue $600 
Cr Service revenue $600
[Being To record revenue from unearned] 
 
5 Oct.31 
Dr Accounts receivable $300 
Cr Service revenue $300
[Being To record accrued revenues] 
 
6 Oct.31
Dr Interest expense $95 
Cr Interest payable $95
[Being To record accrued interest expense] 
 
7 Oct.31
Dr Salaries expesne $1,625 
Cr Salaries payable $1,625
[Being To record salaries expense]