The following table shows the total number of students in four different classes of a school, and the percentages of students participating in Music or Plays from each of these four different classes. NO student participates both in Music and in Plays.
| Classes | Total number of students in each class | Percentage of participants | |
| Music | Plays | ||
| X | 600 | 12 | 8 |
| IX | 400 | 10 | 6 |
| VIII | 280 | 30 | 15 |
| VII | 250 | 10 | 12 |
What is the total number of students who do NOT participate in Music or Plays from classes X and VII, taken together?