trial balance for end of the year 2007

cash DR 75250
Accounts receivable DR 15800
allowance for bad debts CR 700
prepaid rent DR 1100
supplies 3800
accounts payable CR 8400
unearned revenue CR 6200
Long-term note payable CR 8000
common stock CR 25000
retained earnings CR 15000
Landscaping revenue CR 75250
wages expense DR 22000
utility expense DR 8500
rent expense DR 12100

adjusting entries
1. determined that during december $650 in revenue was incorrectly debited to accounts receivable instead of cash (credit was correct)
2. determined we earned $525 in interest on savings acount during the year
3. provided $2600 of landscaping services during december 2007 that was paid for in advance
4. entire years rent ($1100 per month) was paid in advance on jan 1 2007(originally recorded in jan- consider current balance in prepaid rent before posting adjustment)
5. determined there were $1800 of supplies left
6. december utilities are $875 and bill will be paid in january
7. estimated bad debt expense for year as 2% of total credit revenues(total credit revenues for the year was $48000)
8. long-term note was received Sept 1,2007. interest and principal are due august 31,2010. annual interest rate in 10%
9.calculate pretax income(after all adjustmetns) and then record income taxes as 28% of pretax income. taxes will be paid in march 2008

im still new on all this adjusted entries ... please help me