Friends and I were checking Paizo's work with your site and things weren't adding up, so we went to the source and did things by hand: your code is showing 7BP for a light torpedo launcher, but the book shows 4BP for that item. I couldn't find any errata entry for this weapon...so we're pretty sure that you've got a typo. If we're wrong, then sorry for bothering you.
I think this tool is correct. The latest PDF (I think it's called the "3rd printing") of the CRB, pg 302, the "Starship Weapons" table lists "Light Torpedo Launcher" with a cost of 7BP.
Friends and I were checking Paizo's work with your site and things weren't adding up, so we went to the source and did things by hand: your code is showing 7BP for a light torpedo launcher, but the book shows 4BP for that item. I couldn't find any errata entry for this weapon...so we're pretty sure that you've got a typo. If we're wrong, then sorry for bothering you.
Great site, by the way. Thanks for all your work!