On February 8, 2019, A entered into a Contract to Sell with B to purchase the latter's property in Antipolo for a total purchase price of P10,000,000. The parties agreed that A will first make a down payment of P1,000,000 and shall pay the remaining P9,000,000 balance in equal monthly installments for 10 years. On February 8, 2022, A defaulted in payments because of the financial hardships caused by the pandemic.

1. Can A back out and ask for a refund from B? If yes, how much refund is A entitled to?