Consolidated selling , general and administrative expenses for the first quarter of 2009 were $ 365.8 million , or 36.5 percent of sales , compared with $ 362.4 million , or 38.2 percent of sales , for the first quarter last year . Expenses for the quarter were up slightly primarily due to increased incentive compensation and the full consolidation of the company 's Mexico operations as a wholly owned subsidiary . RadioShack acquired the remaining interest of its joint venture , RadioShack de Mexico , S.A. de C.V. in December of 2008 .