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	$ 38,264
106	Accounts receivable	13,318
126	Computer supplies	2,545
128	Prepaid insurance	2,040
131	Prepaid rent	2,900
163	Office equipment	9,000
164	Accumulated depreciationOffice equipment		0
167	Computer equipment	20,400
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	6,400
403	Computer services revenue		35,474
612	Depreciation expenseOffice equipment	0
613	Depreciation expenseComputer equipment	0
623	Wages expense	2,300
637	Insurance expense	0
640	Rent expense	0
652	Computer supplies expense	0
655	Advertising expense	1,688
676	Mileage expense	664
677	Miscellaneous expenses	230
684	Repairs expenseComputer	725
	Totals	$ 100,474	$ 100,474

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 $490 cash for minor repairs to the companys computer.
December 4	Received $4,950 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 $120 per day.
December 14	Notified by Alexs Engineering Company that Business Solutions's bid of $7,600 on a proposed project has been accepted. Alexs paid a $1,800 cash advance to Business Solutions.
December 15	Purchased $1,700 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 $6,425 cash.
December 22-26	Took the week off for the holidays.
December 28	Received $3,000 cash from Gomez Company on its receivable.
December 29	Reimbursed S. Rey for business automobile mileage (600 miles at $0.30 per mile).
December 31	S. Rey withdrew $1,400 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 $600 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 $120 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.