7. (15 points) The plant shooters include Peashooter, Twinshot, Triple-shot, Ice-shooter, Dual-shooter, and Pea Pod, requiring 100, 200, 300, 150, 125, 125 suns respectively to plant one of each type. Feifei planted 10 plant shooters, spending a total of 2500 suns. The number of different possible ways she could have planted them is $\qquad$. (For example, 7 Triple-shot + 1 Ice-shooter + 1 Pea Pod is one possible way that meets the requirements.)
【Solution】Solution: Consider the number of triple shooters, which can only be $5, 6, 7$.
When it is 5, it can only be 5 double shooters, which is 1 case;
When it is 6, it can be 1 Peashooter, 3 double shooters, or 2 double shooters, 2 ice shooters, for a total of 2 cases;

When it is 7, it can be 2 Peashooters, 1 double shooter, or 1 Peashooter, 2 ice shooters, or 1 ice shooter, 1 double shooter, 1 Peashooter, or 1 ice shooter, 1 double shooter, or 1 ice shooter, 2 Peashooters, for a total of 5 cases, so there are $1+2+5=8$ cases in total.

Therefore, the answer is 8.