Answer: a. $715
Step-by-step explanation:
The list of incomes is:
Games: $650
Tables: $525
So, the total income is:

And the list of expenses is:
Decorations: -$60
Prizes: -$400
So, the total amount of expenses is:

To calculate the amount that was raised we need to substract the expenses from the income:

The answer is: a. $715