A baker has $40 to spend on flour and sugar. Flour costs $0.30 per pound, and sugar costs $0.45 per pound. To summarize the situation, the baker writes the inequality: 0.30f+0.45s≤40, where f is the number of pounds of flour, and s is the number of pounds of sugar. Which graph's shaded region shows the possible combinations of flour and sugar the baker can buy?