Most of the required information’s are already given in the question.
The amount of money raised by the soccer team = $3727.25
Cost of each box = $4.25
Then
Number of boxes of cookies sold by the soccer team = 3727.25/4.25
= 877
So 877 boxes were sold by the soccer team. Yes your answer to this question is absolutely correct. I hope your procedure of solving this question is same as has been shown here. I am glad to have come to your help.