Quantity button controls and the minimum quantity

Quantity button controls and the minimum quantity

Hello, is possible handling the multiple quantity and minimum order with "Quantity button controls"?
Example:
The Rose's minimum order is 12. And I can buy it only at multiples of 3.
1) If I clic "-" the quantity don't change
2) If I clic "+" the quantity becomes 15, then 18, 21, ecc...

Is it possible, please? How?
Thank you very much.

p.s. An example at this link http://florityfair.florityfair.com/epages/17231.sf/it_IT/?ObjectPath=/Shops/17231/Products/020

Aw: Quantity button controls and the minimum quantity

Will be latter new version.

Aw: Quantity button controls and the minimum quantity

Install Quantity button controls 1.0.2

Aw: Quantity button controls and the minimum quantity

Hello, thank you so much.
I'm trying to buy it, but I've this error message: <<Minimum order price - 14.00 EUR>>

Could you help me please?

Aw: Quantity button controls and the minimum quantity

Configuration / cat/prod

minimum order price: ?

Aw: Quantity button controls and the minimum quantity

:) no, I would like to buy your commercial extensions ;)

Aw: Quantity button controls and the minimum quantity

Buy 2 addon

See
http://www.webdesigner-profi.de/joomla-webdesign/shop/plugins/quantity-in-product-list.html?lang=en