Finance problems (TVM) on hp 49G+ hp 50G Periods and compounds per year are different

[Gil]

A TVM short program for HP48/49/50G including both C:YR & P:YR, and using the solver.

Payments can be at the End (variable END10=1) or at the beginning of the period (variable END10=0).

Code
\<<
\<< I%YR 100 / C\166YR / 1 + C\166YR ^ P\166YR INV ^ DUP SWAP 1 - \-> ri ii
\<< NofP DUP - PV ri NofP ^ * + FV - ri NofP ^ 1 - ii / END10 1 == 1 ri IFTE * PMT * +
\>>
\>> STEQ 30 MENU
\>>


Working example
For 5%,
5 and A/F1-key, ie 5 and I%YR

For 3 Compounding in a year,
3 and B/F2-key , ie 3 and C¦YR

For 12 Payments in a year,
12 and C/F3-key, ie 12 and P¦YR

For number of payments (Total)
= P¦YR × number of years =12 * 5 = 60,
60 and D/F4-key, ie 60 NofP

30000 and E/F5-key, ie 30000 PV

0 and F/F4-key, ie 0 FV

Then press NXT-key (3rd line, 3rd column)

Then payments at the end? Yes =1
—> 1 A/F1-key, ie 1 END10

Then give any value to PMT, for instance zero
0 B/F2-key, ie 0 PMT

And now use the solver as follows:
Shift-Left (arrow left to key/figure/number 4)
& then press B/F2-key (PMT)

You should get the following result:
PMT: - 565.71.