Fords Motor Company disclosed estimated product warranty provision for comparative years as follows.

Current estimated product warranty payable $12,953 (2008) $14,082 (2007)
Non Current estimated product warranty payable 7,359 (2008) 7,728 (2007)
Total (in million) $20,312 $21,810

Ford's sales were $147,128 million in 2007 and increased to $153,503 million in 2008. Assume that the total paid on warranty claims during 2008 was $12,000 million.

a. Why are short and long term estimated warranty provisions separately disclosed?
b. Provide the journal entry for the 2008 product warranty expense