Slyvia has an income of $600. She consumes only only food and clothes. The price of food is $10/kilo and the price of cloth is $12 per unit. In addition, she has 10 coupons with which she can purchase only food, 20 coupons with which she can purchase only clothes, and 20 coupons each of which can be used to buy either of the goods. Suppose the coupons are perfectly divisible. Draw her budget set and shade the points for which she has to use both money and coupons to attain.