<image>(Autumn 2009•Huaixin District School-level Final) As shown in the figure, \( l_{1} \) represents the relationship between the sales revenue and the sales volume of a company's product, and \( l_{2} \) represents the relationship between the sales cost and the sales volume of the company's product. According to the figure, when \( x = 2 \) tons, the profit is ____ yuan.