Inventories

Inventories consisted of the following:



	March 31 2016			December 31 2015
Long-term contracts in progress		$12,994			$13,858
Commercial aircraft programs	56,840			55,230
Commercial spare parts, used aircraft, general stock materials and other	6,369			6,673
Inventory before advances and progress billings	76,203			75,761
Less advances and progress billings	(28,937		)	(28,504		)
Total		$47,266			$47,257

Long-Term Contracts in Progress

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, 2016, the inventory balance was $120 (net of advances of $293) and $120 (net of advances of $310) at December 31, 2015. At March 31, 2016, $176 of this inventory related to unsold launches. See Note 9.

Included in inventories are capitalized precontract costs primarily related to KC-46A Tanker of $1,163 and $732 at March 31, 2016, and December 31, 2015.

Commercial Aircraft Programs

At March 31, 2016 and December 31, 2015, commercial aircraft programs inventory included the following amounts related to the 787 program: $35,522 and $34,656 of work in process (including deferred production costs of $28,651 and $28,510), $2,500 and $2,551 of supplier advances, and $3,767 and $3,890 of unamortized tooling and other non-recurring costs. At March 31, 2016, $23,661 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 $8,757 is expected to be recovered from units included in the program accounting quantity that represent expected future orders.

At March 31, 2016 and December 31, 2015, commercial aircraft programs inventory included the following amounts related to the 747 program: $876 and $942 of deferred production costs, net of reach-forward losses, and $377 of unamortized tooling costs. At March 31, 2016, $402 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 $851 is expected to be recovered from units included in the program accounting quantity that represent expected future orders. At March 31, 2016 and December 31, 2015, work in process inventory included a number of completed 747 aircraft that we expect to recover from future orders.

Commercial aircraft programs inventory included amounts credited in cash or other consideration (early issue sales consideration) to airline customers totaling $3,198 and $3,166 at March 31, 2016 and December 31, 2015.

Used aircraft in inventories at Commercial Airplanes totaled $351 and $267 at March 31, 2016 and December 31, 2015.