Pedro Santos, a Filipino citizen domiciled in Makati City, died on March 15, 2024, leaving the following assets: (a) family home appraised at ₱10,000,000 (zonal value: ₱9,500,000); (b) investment lot in Taguig with FMV of ₱5,000,000; (c) listed shares of stock worth ₱3,000,000. His outstanding obligations at the time of death included bank loans of ₱1,500,000. Funeral expenses amounted to ₱250,000. His estate was administered without judicial proceedings. Compute the net taxable estate and the estate tax due.