Importing attribute values sent from an external Form?

I'm very new to ZenCart, so I'm not really sure how to ask this question, but I'll do my best and hope someone understands :smile:

basically, I have a PHP -based "calculator" on my non-store site that calculates custom products based on dimensions put in by the customer. The result output includes the size, weight and cost of the product... which I would like to send to ZenCart to populate the attributes of a "product" that could then be ordered and paid for.

Can this be done?

If so, am I going about it in the right fashion?

Essentially I would like to be able to send the customer to the Zencart store with the results of the calculator, such that a product (either through attributes or some other method) would be populated with the specific weight, height, width, price filled in.

They then simply add it to their cart and check out.

Is there a method for passing external data (variables) in to the ZenCart store?

Thanks in advance... and if I am going about this in a boneheaded fashion, please enlighten me :blink: