HexSys Size Plugin Customer prices

I've recently purchased the HexSys Size plugin and it works as it appears it should.

However I need a plugin where a user can select Length and Width and change the price to a pre-defined price. I don't want it to calculate sq unit.

EG:
Length 90mm x Width 6mm = $90 (default product price)
Length 90mm x Width 10mm = $100
Length 100mm x Width 10mm = $130 (default product price)

Is this possible to do with this plugin?

regards
sam p