Here's a gist [0]. You can see that it made a couple of minor semantic mistakes, which it corrected. It also regressed a bit at the end, but it _was_ able to correctly parse the (admittedly simple) math in a WHERE predicate and return a partially valid tuple, with respect to pricing.

[0]: https://gist.github.com/stephanGarland/ed18f8f8fdc63a0b997f9...