Tangerine Company acquired P3,000,000 face value 10% bonds as financial asset at amortized cost, on June 30, 2018 for P3,210,000, excluding brokerage of P150,000 and accrued interest. The bonds pay interest semiannually on May 1 and November 1. The remaining life of the bonds on the date of acquisition is 3 years. Straight-line amortization is employed. On December 31, 2018, the bonds were sold for P3,500,000 plus accrued interest. What is the gain on the sale of the bonds? Show a detailed computation.