Inventories

Inventories consisted of the following:



	March 31 2015			December 31 2014
Long-term contracts in progress		$14,132			$13,381
Commercial aircraft programs	56,549			55,220
Commercial spare parts, used aircraft, general stock materials and other	7,500			7,421
Inventory before advances and progress billings	78,181			76,022
Less advances and progress billings	(29,679		)	(29,266		)
Total		$48,502			$46,756

Long-term contracts in progress includes Delta launch program inventory that is being sold at cost to United Launch Alliance (ULA) under an inventory supply agreement that terminates on March 31, 2021. At March 31, 2015, the inventory balance was $168 (net of advances of $282) and $154 (net of advances of $322) at December 31, 2014. At March 31, 2015, $227 of this inventory related to unsold launches. See Note 10.

Capitalized precontract costs of $1,439 and $1,281 at March 31, 2015 and December 31, 2014, are included in inventories.

At March 31, 2015 and December 31, 2014, commercial aircraft programs inventory included the following amounts related to the 787 program: $34,309 and $33,163 of work in process (including deferred production costs of $26,942 and $26,149), $2,369 and $2,257 of supplier advances, and $3,913 and $3,801 of unamortized tooling and other non-recurring costs. At March 31, 2015, $22,357 of 787 deferred production costs, unamortized tooling and other non-recurring costs are expected to be recovered from units included in the program accounting quantity that have firm orders and $8,498 is expected to be recovered from units included in the program accounting quantity that represent expected future orders.

At March 31, 2015 and December 31, 2014, commercial aircraft programs inventory included the following amounts related to the 747 program: $1,715 and $1,741 of deferred production costs, net of previously recorded reach-forward losses, and $458 and $476 of unamortized tooling costs. At March 31, 2015, $1,054 of 747 deferred production and unamortized tooling costs are expected to be recovered from units included in the program accounting quantity that have firm orders and $1,119 is expected to be recovered from units included in the program accounting quantity that represent expected future orders.

Commercial aircraft programs inventory included amounts credited in cash or other consideration (early issue sales consideration) to airline customers totaling $3,391 and $3,341 at March 31, 2015 and December 31, 2014.

Used aircraft in inventories at Commercial Airplanes totaled $259 and $275 at March 31, 2015 and December 31, 2014.