AT&T Inc. has the total assets of $551,622 million, total liabilities of $367,767 million, the earnings before interests and taxes of $28,251 million, interest expenses of $6,884 million, and depreciation of $22,862 million on its latest financial statements.

Compute its times interest earned ratio.

CarMax has cash of $132 million, inventory of $3,157 million, total current assets of $4,116 million, and total current liabilities of $1,698 million on its latest balance sheet.

Compute its current ratio.

Costco Corp. has the revenues of $195,929 million, costs of $170,684 million, inventory of $14,215 million, receivables of $1,803 million, payables of $22,039 million, and total assets of $59,268 million on its latest financial statements.

Compute its inventory turnover ratio.

Compute its asset turnover ratio.