A toy company can spend no more than $2,000 on raw materials for plastic trains and metal trains. The raw materials cost $0.80 per pound for metal and $0.40 per pound for plastic. To summarize the situation, a worker writes the inequality: 0.8m + 0.4p ≤ 2,000, where m is the number of pounds of metal material and p is the number of pounds of plastic material. Which graph's shaded region shows the possible combinations of raw materials the company can buy?