(12C) Modified Internal Rate of Return - MIRR

[Joe_H]

Final post!

Overall, it was a great challenge and really interesting puzzle but the solution isn't really that practical as the program runs to 96 entries and only 7 registers remain so the max length of the cashflow can only be CF0-CF6 which isn't reasonable. I think there is a shorter way to do it but it involves deleting cashflow entries but I'll give it a shot for the hell of it.

The program offers greater possibilities on the Platinum as there are more registers and a couple can be used for storage which should reduce the program size a bit and also leave room for a long enough cashflow sequence of 12-15 or so (unlikely to do anything higher than that on a hand calculator).

If anyone has any thoughts on how the existing program could be shortened please let me know.