.2 billion in 2007 . the increase in the operating loss was primarily due to a decrease in gross margin , driven by : ( i ) a 36% ( 36 % ) decrease in net sales , ( ii ) excess inventory and other related charges of $ 370 million in 2008 due to a decision to 61management 2019s discussion and analysis of financial condition and results of operations %%transmsg*** transmitting job : c49054 pcn : 064000000 ***%%pcmsg|61 |00028|yes|no|02/24/2009 12:31|0|0|page is valid , no graphics -- color : n| .