50g multiple output

[oierpa]

Hi .
Thnks but program I'm try to made is only an example. I saw that there is a lot of financial functions.
Then I forget to write my simple code:
<<"insert C t a"
{":C:
:t:
:A:"
{1 0 } V} INPUT OBJ-> -> C t A 'C*(t/100/12/(1-(1+t/100/12)^(-A*12)))' -> NUM "R" -> TAG>>

If I try to calculate also total amount due (with formula M=R*A*12) nothing works.

I modified program like this:

<<"insert C t a"
{":C:
:t:
:A:"
{1 0 } V} INPUT OBJ-> -> C t A 'C*(t/100/12/(1-(1+t/100/12)^(-A*12)))' -> NUM "R" -> TAG 'R*A*12' -> NUM "M" -> TAG>>
but ressult it's wrong.
I'm sure is a syntax problem but I don' understand where.
Can someone help me?
Thanks in advance.