The following are the donations made by Mr. and Mrs. Santos on their conjugal properties. Both are resident citizens
of the country.

Date                             Amount                                  Donee
March 3, 2021             P500,000                    Aika, legitimate daughter
July 20, 2021              P400,000                      Tricia, legitimate daughter, on account of marriage
October 4, 2021         P200,000                   Jillian, legitimate daughter

1. How much was the donor's tax payable of Mr. Santos on his 1st donation?

2. How much was the donor's tax payable of Mrs. Santos on her 2nd donation?

3. How much was the total donor's tax payable of Mr. and Mrs. Santos on all their donation?