| Subject | Item | Total for each subject | ||
| 1 | X1 | X4 | X7 | X1 + X4 + X7 |
| 2 | X2 | X3 | X6 | X2 + X3 + X6 |
| 3 | X1 | X5 | X7 | X1 + X5 + X7 |
| 4 | X1 | X3 | X6 | X1 + X3 + X6 |
| 5 | X2 | X5 | X6 | X2 + X5 + X6 |
| 6 | X2 | X4 | X7 | X2 + X4 + X7 |
| Grand total = 3X1 + 3X2 + 2X3 + 2X4 + 2X5 + 3X6 + 3X7 | ||||