The trial balance of Pacilio Security Services Inc. as of January 1, 2014, had the following normal balances:
Cash ............ $12,500
Accounts Receivable ....... 3,500
Supplies ............. 120
Prepaid Rent ......... 1,000
Land ............ 4,000
Unearned Revenue ........ 900
Salaries Payable .......... 1,000
Common Stock ........ 8,000
Retained Earnings ....... 11,220

In 2014, Pacilio Security Services decided to expand its business to sell security systems and offer 24-hour alarm monitoring services. It plans to phase out its current service of providing security personnel at various events. The following summary transactions occurred during 2014.
1. Paid the salaries payable from 2013.
2. Acquired an additional $42,000 cash from the issue of common stock.
3. Rented a larger building on May 1; paid $6,000 for 12 months’ rent in advance.
4. Paid $800 cash for supplies to be used over the next several months by the business.
5. Purchased 50 alarm systems for resale at a cost of $12,000. The alarm systems were purchased on account with the terms 2y10, ny30.
6. Returned one of the alarm systems that had a cost of $240.
7. Installed 40 alarm systems during the year for a total sales amount of $20,000. The cost of these systems amounted to $9,440. $15,000 of the sales were on account and $5,000 were cash sales.
8. Paid the installers and other employees a total of $9,500 in salaries.
9. Sold $36,000 of monitoring services for the year. The services are billed to the customers each month.
10. Paid cash on accounts payable. The payment was made before the discount period expired. At the time of purchase, the inventory had a cost of $8,000.
11. Paid cash to settle additional accounts payable. The payment was made after the discount period expired. At the time of purchase, the inventory had a cost of $2,780.
12. Collected $43,000 of accounts receivable during the year.
13. Performed $12,000 of security services for area events; $9,000 was on account and $3,000 was for cash.
14. Paid advertising cost of $1,620 for the year.
15. Paid $1,100 for utilities expense for the year.
16. Paid a dividend of $12,000 to the shareholders.
Adjustment Information
17. Supplies of $150 were on hand at the end of the year.
18. Recognized the expired rent for the year.
19. Recognized the balance of the unearned revenue; cash was received in 2013.
20. Accrued salaries at December 31, 2014, were $1,500.

Required
a. Record the above transactions in general journal form. (Round amounts to the nearest dollar.)
b. Post the transactions to T-accounts.
c. Prepare a trial balance.
d. Prepare an income statement, statement of changes in stockholders’ equity, balance sheet, and statement of cash flows.
e. Close the temporary accounts to retained earnings.
f. Post the closing entries to the T-accounts and prepare a post-closing trial balance.