1. advertising supplies is an expenses account. therefore you can record advertising supplies - $500 in ur p&l account.
2. i don't know what is expired ins.
3. depreciation for the month 50bucks is an expenses account too. therefore you record in p&l as well. then remember to add the amount into ur accumulated depreciation in your balancesheet.
4. unearned revenue is work done and not earned. therefore you must use the revenue balance - unearned revenue = new revenue balance. the unearned amount of 600 should appear in your balance sheet, current liabilities.
5. service provided but not recorded are $300; it means you earned a revenue of $300. dr cash, cr revenue.
6. interest accrued [occured not yet paid] interest payable $70
7. accrued salaries [consumed not yet paid] $1500 means salaries is not yet paid. you got to create a salaries account or add $1500 back to salaries.

this are what i know, i hope it helps. (: