Setting Item user defined quantities on a Product

hi Guys,

I am trying to set up a product which sells binders. usually the binders are sold in large quantities, the quantity of which is defined by the user.

For example User A might want to purchase 346 binders and user B might want to purchase 1098 binders.

link to example product: http://shop.realityslab.com/index.php?r ... uct_id=488

I have assigned an options filter called "Quantity Required" ideally I would like the user to enter the quantity of binders they wish the purchase and then the quantity to be multiplied by the product price.

Using the Link provided I will provide an example:

User A purchase 40 binders, this would = 40 x £1.27 = £50.80. so £50.80 would be added to the basket.

On a similar issue it would be cool if once a user ordered 500 binders (which would usually equal to £635 (500 x 1.27) I could assign a discount bulk order price which could be defined by me. so if a user decided to by 500 binders the actual price they would pay would be £550.

Any help would be appreciated. I would be prepared to pay someone for custom work for this or if anyone knows any extensions which would achieve this I would be much appreciated.

Kind Regards,
Sam

Here is a good extension that you may be suited for
http://www.opencart.com/index.php?route ... on_id=4927

Cheers Looks great