Mr. Minamalas died leaving properties, with their corresponding values, and obligations, that follow: 
• Land, inherited during marriage, 18 months before death (with fair market value of P12,500,000 when inherited and P13,500,000 at the time of death. This property is also subject to a mortgage amounting to P1,900,000 when inherited P1,500,000 of which was paid by Mr. Minamalas before he died. 
• Residential house and lot acquired during the marriage (family home), P12,000,000. 
• Personal properties acquired during the marriage, P15,000,000. 
• Claims against conjugal properties, P800,000. 
• Unpaid mortgage on inherited land, P400,000. 

Required:  
1. Compute the taxable gross estate. 
2. Compute the vanishing deduction 
3. Compute the Share of surviving spouse 
4. Compute the estate tax