.6% ( 17.6 % ) , down slightly from 17.9% ( 17.9 % ) for 2011 . days sales outstanding was 61 days in 2012 , a one day improvement from 2011 . inventories on a fifo basis as a percentage of fourth quarter sales , annualized , for 2012 was 13.2% ( 13.2 % ) up slightly from 13.1% ( 13.1 % ) in 2011 . inventory turnover was 4.8 times in 2012 and 5.0 times in 2011 . total capital spending , including acquisitions , was $ 533 million , $ 446 million and $ 341 million in 2012 , 2011 , and 2010 , respectively