We are given that the condominium cost Php 5,700,000.00 and a down payment was made. Since the down payment was 30% of the total cost, therefore we can conclude that the mortgage amount is 70% of the total cost. Hence:
 70% = 0.70
  
 mortgage amount = 5,700,000.00 * 0.70
 mortgage amount = 3,990,000.00
  
 Answer:
 Php 3,990,000.00