Engineering Economics
A person buys a piece of lot for P 100,000 downpayment and 10 deferred semi-annual payments of P 8,000 each, starting three years from now. What is the present value of the investment if the rate of interest is 12% compounded semi-annually?

P 143,104.89
P 142,999.08
P 142,189.67
P 143,999.08

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Engineering Economics
Perfect monopoly exists only if:

the single vendor is the only one who has the permit to sell
the single vendor is the only one who has the knowledge of the product
the single vendor can prevent the entry of all other vendors in the market
the single vendor gets the absolute franchise of the product

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