After the success of the companys first two months, Santana Rey continues to operate Business Solutions. The November 30, 2021, unadjusted trial balance of Business Solutions (reflecting its transactions for October and November of 2021) follows.

Number	Account Title	Debit	Credit
101	Cash	$ 38,464
106	Accounts receivable	12,618
126	Computer supplies	2,645
128	Prepaid insurance	2,160
131	Prepaid rent	2,920
163	Office equipment	8,300
164	Accumulated depreciationOffice equipment		0
167	Computer equipment	21,200
168	Accumulated depreciationComputer equipment		0
201	Accounts payable		0
210	Wages payable		0
236	Unearned computer services revenue		0
301	S. Rey, Capital		65,000
302	S. Rey, Withdrawals	6,500
403	Computer services revenue		35,504
612	Depreciation expenseOffice equipment	0
613	Depreciation expenseComputer equipment	0
623	Wages expense	2,400
637	Insurance expense	0
640	Rent expense	0
652	Computer supplies expense	0
655	Advertising expense	1,688
676	Mileage expense	684
677	Miscellaneous expenses	200
684	Repairs expenseComputer	725
	Totals	$ 100,504	$ 100,504

Business Solutions had the following transactions and events in December 2021.

December 2	Paid $1,020 cash to Hillside Mall for Business Solutions's share of mall advertising costs.
December 3	Paid $450 cash for minor repairs to the companys computer.
December 4	Received $4,350 cash from Alexs Engineering Company for the receivable from November.
December 10	Paid cash to Lyn Addie for six days of work at the rate of $100 per day.
December 14	Notified by Alexs Engineering Company that Business Solutions's bid of $7,100 on a proposed project has been accepted. Alexs paid a $1,600 cash advance to Business Solutions.
December 15	Purchased $1,400 of computer supplies on credit from Harris Office Products.
December 16	Sent a reminder to Gomez Company to pay the fee for services recorded on November 8.
December 20	Completed a project for Liu Corporation and received $6,475 cash.
December 22-26	Took the week off for the holidays.
December 28	Received $3,800 cash from Gomez Company on its receivable.
December 29	Reimbursed S. Rey for business automobile mileage (500 miles at $0.26 per mile).
December 31	S. Rey withdrew $1,300 cash from the company for personal use.

The following additional facts are collected for use in making adjusting entries prior to preparing financial statements for the companys first three months.

1. The December 31 inventory count of computer supplies shows $650 still available.
2. Three months have expired since the 12-month insurance premium was paid in advance.
3. As of December 31, Lyn Addie has not been paid for four days of work at $100 per day.
4. The computer system, acquired on October 1, is expected to have a four-year life with no salvage value.
5. The office equipment, acquired on October 1, is expected to have a five-year life with no salvage value.
6. Three of the four months' prepaid rent have expired.

Required: 1. Prepare journal entries to record each of the December transactions and events for Business Solutions. 2-a. Prepare adjusting entries to reflect a through f. 2-b. Post the journal entries to record each of the December transactions, adjusting entries to the accounts in the ledger. 3. Prepare an adjusted trial balance as of December 31, 2021