Measurement calculator plug-in

Hello everyone,

I am looking for a simple calculator like the moonsoft calc builder for Joomla!. Even less complicated would be enough as all i need is a form with a textbox for height and a textbox for width and a calculate button.

The calculator should round the numbers up by 20 and roll out a price.
So it’d be like this:

Width = 134 –> in calculator between 120 and 140 –> 140
Height = 189 –> in calculator between 180 and 200 –> 200

and then i should be able to add a table that reads 140*200 and tell the client that’d be € 150,-..

so actually a table, but they don’t read the table, just put in their measurements and the plug-in should read whats at that column*row in the table..

I hope there’s a simple plug-in out there that does this…

Yours sincerely,
Jeroen