A math teacher just announced that, by the end of the semester, all students should score above 85% on the final exam. There are 30 students in the class. Here are the grades of the students: <br>15 students scored above 90%. <br>8 students scored between 85% and 90%. <br>4 students scored between 80% and 85%. <br>3 students scored below 80%. <br>How many students met the teacher's goal?