Final answer:
The full amount of $500 per month as stated in the divorce agreement is considered alimony, since no other details are given that would imply otherwise.
Step-by-step explanation:
The question at hand involves calculating the correct amount of alimony payments under a divorce agreement. According to the information provided, Matt is required to make periodic payments of $500 per month to Grace. Since there is no additional information provided to suggest that some of the $500 may not be considered alimony (e.g., portions that could be designated for child support or other expenses), the full amount is presumed to be alimony. Therefore, the answer is $500 per month.