They have collected 
 cans until now. To equal 325, they need
 cans until now. To equal 325, they need 
 cans more.
 cans more.
A.
Let C be the number needed to equate atleast 325. 

B.
If we solve the inequality in part A, we can find minimum number of C to meet the goal of 325 cans.

So they need minimum 101 to complete the target and more than that to surpass.
ANSWER: 101 cans are needed to meet the goal and more than that to surpass the goal.