A school is purchasing notebooks and pens for its students. Each notebook costs $2.50 and each pen costs $1.25. The school has a budget of at most $1000 for these supplies. Let be the number of notebooks and be the number of pens purchased. Which of the following combinations of notebooks and pens is NOT within the school's budget?
| N | P |
|---|---|
| 200 | 400 |
| N | P |
|---|---|
| 300 | 150 |
| N | P |
|---|---|
| 350 | 100 |
| N | P |
|---|---|
| 250 | 350 |
