HP HP12C hp 12c_user's guide_English_E_HDPMBF12E44.pdf - Page 186
Appendix D: Formulas Used
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186 Appendix D: Formulas Used Compound Interest Without an odd period: 0 = PV + (1+ iS) ⋅ PMT ⋅ ⎡1− (1+ i)−n ⎢ ⎢⎣ i + FV (1+ i)−n With simple interest used for an odd period: 0 = PV [1+ iFRAC(n)] + (1+ iS)PMT ⎡1 (1+ i ) − INTG(n) i + FV (1+ i)−INTG(n) With compound interest used for an odd period: 0 = PV (1+ i)FRAC(n) + (1+ iS)PMT ⎡1 (1+ i ) − INTG(n) i + FV (1+ i)−INTG(n) Amortization n INTj PRNj PVj = number of payment periods to be amortized. = amount of PMT applied to interest in period j. = amount of PMT applied to principal in period j. = present value (balance) of loan after payment in period j. j INT1 PRN1 PV1 INTj PRNj PVj = period number. = {0 if n = 0 and payment mode is set to Begin. |PV0 × i|RND (sign of PMT) = PMT - INT1 = PV0 + PRN1 = |PVj -1 × i|RND × (sign of PMT) for j > 1. = PMT - INTj = PVj -1 + PRNj n ∑ INT = ∑ INTj = INT1 + INT2 + ... + INTn j=1 n ∑ PRN = ∑ PRNj = PRN1 + PRN2 + ... + PRNn j=1 PVn = PV0 + ∑ PRN File name: hp 12c_user's guide_English_HDPMBF12E44 Printered Date: 2005/7/29 Page: 186 of 209 Dimension: 14.8 cm x 21 cm