Texas Instruments TI-84 PLUS SILV Guidebook - Page 396
Amortization, Cash Flow
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where: i ƒ 0 FV = -(PV + PMT × N) where: i = 0 Amortization If computing bal(), pmt2 = npmt Let bal(0) = RND(PV) Iterate from m = 1 to pmt2 ⎧ Im = RND[RND12(-i × bal(m - 1))] ⎨ ⎩ bal(m ) = bal(m - 1) - Im + RND(PMT) then: bal( ) = bal(pmt2) ΣPrn( ) = bal(pmt2) - bal(pmt1) ΣInt( ) = (pmt2 - pmt1 + 1) × RND(PMT) - ΣPrn( ) where: RND = round the display to the number of decimal places selected RND12 = round to 12 decimal places Balance, principal, and interest are dependent on the values of PMT, PV, æ, and pmt1 and pmt2. Cash Flow ∑ npv( ) = CF0 + N C Fj ( 1 + i - ) Sj - 1 (1 - (1 + i)-nj i j=1 where: ⎧ ⎪ j ∑ Sj = ⎪ ⎪⎨ i = ni 1 ⎪ ⎩ 0 j≥1 j=0 Net present value is dependent on the values of the initial cash flow (CF0), subsequent cash flows (CFj), frequency of each cash flow (nj), and the specified interest rate (i). irr() = 100 × i, where i satisfies npv() = 0 Appendix B: Reference Information 389