ABC CORP, a large software developer is involved in the creation and sales of custom billing software for companies. The figure shows their quarterly sales figure for the last 4 years. The companys profit is its total sales minus the cost of pay for salespeople and typical business costs. If salespeople earn 10% of their sales in pay and typical business costs account for 20% of the value of each sale, how much more profit was earned in 2010 than in 2007? a) $ 4.0 million b) $ 4.2 million c) $ 5.0 million d) $ 6.0 million e) $ 6.4 million

Sales for ABC Corp 21 20 19 18 17 16 19S 14 13 . 1st Quarter #2nd Quarter 3rd Quarter 4th Quarter - 10 8 7 6 5 0 2007 2008 2009 2010