delivered in 2015 compared to seven delivered in 2014 ) . the increases were partially offset by lower net sales of approximately $ 350 million for the c-130 program due to fewer aircraft deliveries ( 21 aircraft delivered in 2015 , compared to 24 delivered in 2014 ) , lower sustainment activities and aircraft contract mix ; approximately $ 200 million due to decreased volume and lower risk retirements on various programs ; approximately $ 195 million for the f-16 program due to fewer deliveries ( 11 aircraft delivered in 2015 , compared to 17 delivered in 2014 ) ; and approximately $ 190 million for the f-22 program as a result of decreased sustainment activities . aeronautics 2019 operating profit in 2015 increased $ 32 million , or 2% ( 2 % ) , compared to 2014 . operating profit increased by approximately $ 240 million for f-35 production contracts due to increased volume and risk retirements ; and approximately $ 40 million for the c-5 program due to increased risk retirements . these increases were offset by lower operating profit of approximately $ 90 million for the f-22 program due to lower risk retirements ; approximately $ 70 million for the c-130 program as a result of the reasons stated above for lower net sales ; and approximately $ 80 million due to decreased volume and risk retirements on various programs . adjustments not related to volume , including net profit booking rate adjustments and other matters , were approximately $ 100 million higher in 2015 compared to 2014 . backlog backlog increased in 2016 compared to 2015 primarily due to higher orders on f-35 production and sustainment programs . backlog increased in 2015 compared to 2014 primarily due to higher orders on f-35 and c-130 programs . trends we expect aeronautics 2019 2017 net sales to increase in the low-double digit percentage range as compared to 2016 due to increased volume on the f-35 program . operating profit is expected to increase at a slightly lower percentage range , driven by the increased volume on the f-35 program , partially offset by contract mix that results in a slight decrease in operating margins between years . missiles and fire control our mfc business segment provides air and missile defense systems ; tactical missiles and air-to-ground precision strike weapon systems ; logistics ; fire control systems ; mission operations support , readiness , engineering support and integration services ; manned and unmanned ground vehicles ; and energy management solutions . mfc 2019s major programs include pac-3 , thaad , multiple launch rocket system , hellfire , jassm , javelin , apache , sniper ae , low altitude navigation and targeting infrared for night ( lantirn ae ) and special operations forces contractor logistics support services ( sof clss ) . in 2016 we submitted a bid for the special operations forces global logistics support services ( sof glss ) contract , which is a competitive follow-on contract to sof clss . we anticipate an award decision on the follow-on contract in mid-2017 . mfc 2019s operating results included the following ( in millions ) : .
||2016|2015|2014|
|net sales|$ 6608|$ 6770|$ 7092|
|operating profit|1018|1282|1344|
|operating margin|15.4% ( 15.4 % )|18.9% ( 18.9 % )|19.0% ( 19.0 % )|
|backlog atyear-end|$ 14700|$ 15500|$ 13300|
2016 compared to 2015 mfc 2019s net sales in 2016 decreased $ 162 million , or 2% ( 2 % ) , compared to 2015 . the decrease was attributable to lower net sales of approximately $ 205 million for air and missile defense programs due to decreased volume ( primarily thaad ) ; and lower net sales of approximately $ 95 million due to lower volume on various programs . these decreases were partially offset by a $ 75 million increase for tactical missiles programs due to increased deliveries ( primarily hellfire ) ; and approximately $ 70 million for fire control programs due to increased volume ( sof clss ) . mfc 2019s operating profit in 2016 decreased $ 264 million , or 21% ( 21 % ) , compared to 2015 . operating profit decreased approximately $ 145 million for air and missile defense programs due to lower risk retirements ( pac-3 and thaad ) and a reserve for a contractual matter ; approximately $ 45 million for tactical missiles programs due to lower risk retirements ( javelin ) ; and approximately $ 45 million for fire control programs due to lower risk retirements ( apache ) and program mix . adjustments not related to volume , including net profit booking rate adjustments and reserves , were about $ 225 million lower in 2016 compared to 2015. .

Question: what were average net sales for mfc in millions between 2014 and 2016?
Answer: 6823.33333