Martin and Eva pool their loose change to buy snacks on their coffee break. One day they spent 6.75 on 1 carton of milk 2 donuts and 1 cup of coffee The next day they spent 8.50 on 3 donuts and 2 cups of coffee. The third day they bought 1 carton of milk 1 donut and 2 cups of coffee and spent 7.25. On the fourth day, they have a total of 6.45 left.
Is it enough to buy 2 cartons of milk and 2 donuts?