College Coasters is a San Diego–based merchandiser specializing in logo-adorned drink coasters. The company reported the following balances in its unadjusted trial balance at December 1. Cash $ 8,400
Accounts Receivable 1,920
Inventory 450
Prepaid Rent 600
Equipment 850
Accumulated Depreciation 90
Accounts Payable 1,440
Salaries and Wages Payable 200
Income Taxes Payable 0
Common Stock 5,500
Retained Earnings 2,500
Sales Revenue 15,510
Cost of Goods Sold 8,630
Rent Expense 1,100
Salaries and Wages Expense 1,800
Depreciation Expense 90
Income Tax Expense 0
Office Expenses 1,400

The company buys coasters from one supplier. All amounts in Accounts Payable on December 1 are owed to that supplier. The inventory on December 1 consisted of 900 coasters, all of which were purchased in a batch on July 10 at a unit cost of $0.50. College Coasters records its inventory using perpetual inventory accounts and the FIFO cost flow method.

During December, the company entered into the following transactions. Some of these transactions are explained in greater detail below.

Purchased 400 coasters on account from the regular supplier on 12/1 at a unit cost of $0.52, with terms of n/60.
Purchased 1,000 coasters on account from the regular supplier on 12/2 at a unit cost of $0.55, with terms of n/60.
Sold 1,900 coasters on account on 12/3 at a unit price of $1.10.
Collected $870 from customers on account on 12/4.
Paid the supplier $1,310 cash on account on 12/18.
Paid employees $480 on 12/23, of which $260 related to work done in November and $220 was for wages up to December 22.
Loaded 90 coasters on a cargo ship on 12/31 to be delivered the following week to a customer in Kona, Hawaii. The sale was made FOB destination with terms of n/60.

Other relevant information includes the following at 12/31:

College Coasters has not yet recorded $190 of office expenses incurred in December on account.
The company estimates that the equipment depreciates at a rate of $10 per month. One month of depreciation needs to be recorded.
Wages for the period from December 23–31 are $100 and will be paid on January 15.
The $600 of Prepaid Rent relates to a six-month period ending on May 31 of next year.
The company incurred $800 of income tax but has made no tax payments this year.
No shrinkage or damage was discovered when the inventory was counted on December 31.
The company did not declare dividends and there were no transactions involving common stock.