Right now, 60 AUD is ~38.81 USD.
Imma just be honest, that's outrageous for a Roblox raytracer, no matter how efficient it is.
I'm not trying to tell you what you absolutely have to do; it's your project after all—But I feel like just asking people to credit you and making the project free to use would be the best way to go for something like this, plus it'd be more accessible to smaller creators who can't afford it (mainly minors).