do not know how to calculate the retained eaenings.

After the success of the company's first two months, Santana Rey continues to operate Business Solutions. The November 30,2018 , unadjusted trial balance of Business Solutions (reflecting its transactions for October and November of 2018) follows. Business Solutions had the following transactions and events in December 2018 . Dec. 2 Paid $1,010 canh to Hillside Mal1 for Business solutions' aharo of mal1 advertising costs. 3 Paid $420 cash for minor repaird to the company's computer. 4 Received $4,250 eash from Alex"s Engineering Co. for the receivable from Novembor. 10 Paid cash to lyn Addie for six days of work at the rate of $105 por day. 14 Notified by Alex'" Engineering Co. that Dusiness Solutions bid of 57,200 on a proposed project has been accepted. Alex's paid a $2,100 canh advance to Bunineng solutions. 15 Purchased \$1, 200 of conputer supplies on credit from Harrin office products. 16 Sent a reminder to Gonez Co, to pay the fee for services recorded on November 8. 20 Completed a project for hiu Corporation and received $6,325 cosh. 22 - Took the weok otf for the holidays; 26 28 Received $3,800 cash from conez Co. on ita receivable. 29 Reimbursed S. Fey tor business autotobile mileage (600 milen at 50,27 per mile). 31 The company paid $1,300 cash in dividends. The following additional facts are collected for use in making adjusting entries prior to preparing financial statements for the company's first three months: a. The December 31 inventory count of computer supplies shows $680 still available. b. Three months have expired since the 12 -month insurance premium was paid in advance. c. As of December 31 , Lyn Addie has not been paid for four days of work at $105 per day. d. The computer system, acquired on October 1 , is expected to have a four-year life with no salvag t value. e. The office equipment, acquired on October 1 , is expected to have a five-year life with no salvage value. f. Three of the four months' prepaid rent have expired. 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 31,2018 . 4. Prepare an income statement for the three months ended December 31, 2018 . 5. Prepare a statement of retained earnings for the three months ended December 31, 2018. 6. Prepare a balance sheet as of December 31,2018. 7. Record and post the necessary closing entries as of December 31, 2018. 8. Prepare a post-closing trial balance as of December 31, 2018