1.    Charlene buys a laptop worth PhP80,000 if paid in cash. On an installment basis she pays



PhP35,000 down payment, Php 10,000 at the end of 1 year, PhP 9,000 at the end of 2 years, and a final payment at the end of 3 years. If money is worth 7% effective, what is the final payment?



2.    Rogine owes the following obligations



a. PhP 18,000 due in 2 years, and



b. PhP 12,000 due in 5 years with accumulated interest from today at 16% compounded quarterly. 

If he was allowed to replace these obligations by a payment of PhP 10,000 on the 1st year and another at the end of 4 years, how much is the second payment if money is worth 14% compounded semiannually.