dropdown option with two different values possible?

Hi,
thank you for your great plugin. I am working with it for the first time and it is really amazing.
My problem is:
I want to calculate weight and prices with a dropdown menu. Every option has a factor for weight (value1) and a unique price (value2). I want to calculate first the weight and then the price depending of the weight. Is it possible to give two values to a droptown option an calculate on different fields with value1 and value2?

Thank you very much in advance,

Vera