The appropriate time average of {yit} is 
, where Ti is:
Definitions:
Accounts Receivable
Funds that customers owe to a business for products or services that have been provided but not yet compensated for.
Other Receivable
Accounts receivable that do not fit standard trade transactions, sometimes including loans to employees or advances to suppliers.
Notes Receivable
Claims against others for money, goods, or services evidenced by notes, promises to pay, or receipts.
Bad Debt Expense
An expense recognized by businesses for accounts receivable that are not expected to be collected.
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