Construct a data file about the purchasing behavior of four customers, described below, who visit a shopping mall. Enter the purchase amounts each spent on clothes, sporting goods, books, and food. Customer 1 spent \(\$ 49\) on clothes and \(\$ 16\) on food; customer 2 spent \(\$ 150\) on sporting goods, \(\$ 43\) on books, and \(\$ 25\) on food; customer 3 didn't purchase anything; and customer 4 spent \(\$ 87\) on clothes, \(\$ 15\) on sporting goods, and \(\$ 12\) on food.