I am not sure if this is the right place to do this but Text Funnels always get my heart racing and I am in doubt that I am the only one that finds them challenging.
To be honest, I wouldn’t use a complicated text funnel like this any more. Back in 1990 Panorama had much more limited text manipulation functions. If I was to write this today it would be much simpler to just use this formula:
after(Line,"$")
Instead of
Line["$",-1][2,-1]
I do still use simple text funnels sometimes, but very rarely the more complicated ones.