HP Forums
41C Real Estate Pac manual minor erratum - Printable Version

+- HP Forums (https://www.hpmuseum.org/forum)
+-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html)
+--- Forum: General Forum (/forum-4.html)
+--- Thread: 41C Real Estate Pac manual minor erratum (/thread-4147.html)



41C Real Estate Pac manual minor erratum - Dave Britten - 06-13-2015 03:05 PM

One of the forumlae given for amortization on page 67 is wrong, at least in the printing present on the museum DVD:

Quote:BAL(j) = BAL(j-1) - PRN(j)

That should read:

Quote:BAL(j) = BAL(j-1) + PRN(j)

Note the sign difference. Gripping stuff, I know. Using the corrected formula (which matches the formula in the 12C manual), I get results matching the 12C for a 300 period amort of $50,000 at 13.25% anually with $573.35 payments.