Adding dynamic setup costs

Hello everyone.

I'm currently making a webshop for funny and interesting gifts.
Right now I'm trying to add setup costs as a select box in each product page, however I'm having a bit of trouble with that.

http://www.deleukstegeschenken.nl/uploa ... search=non

I have two select boxes with which the quantity of colours and positions of printing can be chosen. I want to add a select box that dynamically retains the quantities of the previous two selectboxes.
Example:

Quantity of colour: 2
Positions to print: 1
Setup costs: 3 x 30.00

Exactly in the way that it works here: http://www.depennenwinkel.nl/product/Ca ... /1957.html

Is there an extensions that I can acquire that can help me do this? Or is there another way that I can do this?
Your feedback is much obliged!

Ivanpeev wrote:Hello everyone.

I'm currently making a webshop for funny and interesting gifts.
Right now I'm trying to add setup costs as a select box in each product page, however I'm having a bit of trouble with that.

http://www.deleukstegeschenken.nl/uploa ... search=non

I have two select boxes with which the quantity of colours and positions of printing can be chosen. I want to add a select box that dynamically retains the quantities of the previous two selectboxes.
Example:

Quantity of colour: 2
Positions to print: 1
Setup costs: 3 x 30.00

Exactly in the way that it works here: http://www.depennenwinkel.nl/product/Ca ... /1957.html

Is there an extensions that I can acquire that can help me do this? Or is there another way that I can do this?
Your feedback is much obliged!

Yes. I think this extension will do the trick for you as it let you relate the option any way you want.

http://www.opencart.com/index.php?route ... n_id=20902

The reason why you can do it at the moment is because Opencart standalone doesn't relate between options.