Condition Statement Price-Calc

Hi there ??

Thanks for this plugin. It is almost exactly what I need for my website, except for one thing. I am creating a printing quote system for my printing press. So the user gets to pick the paper weight, paper size, number of pages they want printed, whether they want a glossy finish on the paper etc. So the final price is very dependent on other conditions. For example if they select A4 size then another dropdown should appear once A4 is selected to choose between two different paper types for A4. I looked up the syntax for condition statements and no matter what I try it’s just not working. This is my current structure.

#base_price|Base Price
== Options
@paper_size|Paper Size*|1|
-0|Select Size
-A6|A6
-DL|DL
-A5|A5
-A4|A4
@A4paper_type|Select 1 type of A4 paper?*|1|paper_size in (A4)|
-0|Please Select
-Glossy|Glossy Finish
-Matt|Matt Finish

As far as I can tell my condition statement is correct. Essentially once the user selects A4 from the paper size, I’d like the paper_type dropdown to appear where they choose glossy paper or matte paper.

Please tell me what I am doing wrong?

Thanks!!! ??