1. Determine the ordinary and exact simple interest on P5,000 for the period from January 15 to June 20, 1993, if the rate of simple interest is 14%. 2. Determine the exact and ordinary simple interest on P1,200 for the period from January 16 to November 26, 1992, if the rate of interest is 24%. 3. A man borrows P10,000 from a loan firm. The rate of simple interest is 15%, but the interest is to be deducted from the loan at the time the money is borrowed. At the end of one (1) year he has to pay back P10,000. What is the actual rate of interest? 4. A man borrows P6,400 from a loan association. In repaying this debt he has to pay P400 at the end of every 3 months on the principal and a simple interest of 16% on the principal outstanding that time. Determine the total amount he has paid after paying all his debt. 5. If the sum of P12,000 is deposited in an account earning interest at the rate of 9% compounded quarterly, what will it become at the end of 8 years?