Final answer:
The total monthly income of Mark's family is PHP 16,500.00.
Step-by-step explanation:
To calculate the total monthly income of Mark's family, we need to add up the monthly salaries and allowances of his parents. Mark's father earns PHP 12,000.00 per month, and Aling Dionisia earns PHP 4,500.00 per month. Mark's mother budgeted PHP 6,500.00 for food, so this is not part of the total income. Therefore, the total monthly income of Mark's family is PHP 12,000.00 + PHP 4,500.00 = PHP 16,500.00.