Read the following texts and table with financial data from an S&P 500 earnings report carefully.Based on the question-answer history (if provided), answer the last question. The answer may require mathematical calculation based on the data provided.


2011 compared to 2010 is&gs 2019 net sales for 2011 decreased $ 540 million , or 5% ( 5 % ) , compared to 2010 . the decrease primarily was attributable to lower volume of approximately $ 665 million due to the absence of the dris program that supported the 2010 u.s . census and a decline in activities on the jtrs program . this decrease partially was offset by increased net sales on numerous programs . is&gs 2019 operating profit for 2011 increased $ 60 million , or 7% ( 7 % ) , compared to 2010 . operating profit increased approximately $ 180 million due to volume and the retirement of risks in 2011 and the absence of reserves recognized in 2010 on numerous programs ( including among others , odin ( about $ 60 million ) and twic and automated flight service station programs ) . the increases in operating profit partially were offset by the absence of the dris program and a decline in activities on the jtrs program of about $ 120 million . adjustments not related to volume , including net profit rate adjustments described above , were approximately $ 130 million higher in 2011 compared to 2010 . backlog backlog decreased in 2012 compared to 2011 primarily due to the substantial completion of various programs in 2011 ( primarily odin , u.k . census , and jtrs ) . the decrease in backlog during 2011 compared to 2010 mainly was due to declining activities on the jtrs program and several other smaller programs . trends we expect is&gs 2019 net sales to decline in 2013 in the mid single digit percentage range as compared to 2012 primarily due to the continued downturn in federal information technology budgets . operating profit is expected to decline in 2013 in the mid single digit percentage range consistent with the expected decline in net sales , resulting in margins that are comparable with 2012 results . missiles and fire control our mfc business segment provides air and missile defense systems ; tactical missiles and air-to-ground precision strike weapon systems ; fire control systems ; mission operations support , readiness , engineering support , and integration services ; logistics and other technical services ; and manned and unmanned ground vehicles . mfc 2019s major programs include pac-3 , thaad , multiple launch rocket system ( mlrs ) , hellfire , javelin , joint air-to-surface standoff missile ( jassm ) , apache fire control system ( apache ) , sniper ae , low altitude navigation and targeting infrared for night ( lantirn ae ) , and sof clss . mfc 2019s operating results included the following ( in millions ) : . <table class='wikitable'><tr><td>1</td><td>-</td><td>2012</td><td>2011</td><td>2010</td></tr><tr><td>2</td><td>net sales</td><td>$ 7457</td><td>$ 7463</td><td>$ 6930</td></tr><tr><td>3</td><td>operating profit</td><td>1256</td><td>1069</td><td>973</td></tr><tr><td>4</td><td>operating margins</td><td>16.8% ( 16.8 % )</td><td>14.3% ( 14.3 % )</td><td>14.0% ( 14.0 % )</td></tr><tr><td>5</td><td>backlog at year-end</td><td>14700</td><td>14400</td><td>12800</td></tr></table> 2012 compared to 2011 mfc 2019s net sales for 2012 were comparable to 2011 . net sales decreased approximately $ 130 million due to lower volume and risk retirements on various services programs , and about $ 60 million due to lower volume from fire control systems programs ( primarily sniper ae ; lantirn ae ; and apache ) . the decreases largely were offset by higher net sales of approximately $ 95 million due to higher volume from tactical missile programs ( primarily javelin and hellfire ) and approximately $ 80 million for air and missile defense programs ( primarily pac-3 and thaad ) . mfc 2019s operating profit for 2012 increased $ 187 million , or 17% ( 17 % ) , compared to 2011 . the increase was attributable to higher risk retirements and volume of about $ 95 million from tactical missile programs ( primarily javelin and hellfire ) ; increased risk retirements and volume of approximately $ 60 million for air and missile defense programs ( primarily thaad and pac-3 ) ; and about $ 45 million from a resolution of contractual matters . partially offsetting these increases was lower risk retirements and volume on various programs , including $ 25 million for services programs . adjustments not related to volume , including net profit booking rate adjustments and other matters described above , were approximately $ 145 million higher for 2012 compared to 2011. .
Question: what were net sales in 2012?
Answer: 7457.0
Question: what were net sales in 2011?

7463.0