Present Valuea. Interest paid once. $-$ a b c d e fUnpaid Balanceb. Start at $0$ and make periodic payments to get a particular amount in the future. $-$ a b c d e fFuture Valuec. Gives the amount to have left to pay after the pm payments toward the debt. $-$ a b c d e fSimple Interestd. Interest paid every compounding period. $-$ a b c d e fContinuous Intereste. Interest paid infinite number of times. $-$ a b c d e fCompound Interestf. Start at a particular amount and make periodic payments to get to $0.$