An Engineer bought an equipment and have paid Php 100,000 cash and agreed to pay Php 20,000 at the end of each 6 months for 5 years. He failed to pay the first 5 payments. At the end of 3 years, he is required to pay all accumulated and future liabilities, otherwise the equipment would be retrieved by the seller. What must he pay if money is worth 12% compounded semi-annually?