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$9,600Accounts Receivable1,700Inventory360Prepaid Rent720Equipment860Accumulated Depreciation100Accounts Payable1,340Salaries and Wages Payable300Income Taxes Payable0Common Stock6,300Retained Earnings2,700Sales Revenue15,290Cost of Goods Sold8,370Rent Expense1,320Salaries and Wages Expense1,800Depreciation Expense100Income Tax Expense0Office Expenses1,200

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 $0.40. 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.

1. Purchased 400 coasters on account from the regular supplier on 12/1 at a unit cost of $0.42, with terms of n/60.
2. Purchased 1,000 coasters on account from the regular supplier on 12/2 at a unit cost of $0.45, with terms of n/60.
3. Sold 1,700 coasters on account on 12/3 at a unit price of $1.00.
4. Collected $900 from customers on account on 12/4.
5. Paid the supplier $1,420 cash on account on 12/18.
6. Paid employees $450 on 12/23, of which $250 related to work done in November and $200 was for wages up to December 22.
7. Loaded 100 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:

1. College Coasters has not yet recorded $190 of office expenses incurred in December on account.
2. The company estimates that the equipment depreciates at a rate of $10 per month. One month of depreciation needs to be recorded.
3. Wages for the period from December 23-31 are $100 and will be paid on January 15.
4. The $720 of Prepaid Rent relates to a six-month period ending on May 31 of next year.
5. The company incurred $800 of income tax but has made no tax payments this year.
6. No shrinkage or damage was discovered when the inventory was counted on December 31.
7. The company did not declare dividends and there were no transactions involving common stock.

HOW IS COST OF GOODS CALCULATED/WHAT IS THE COST OF GOODS?