Extension for product discount based on customer group

Good day,

Can anyone recommend an extension that I can use to add a discount on specific products based on a customer discount group. For example: Some customers will be added to the VIP customer group and will then receive 5% discount on all (or some specific) computers, but they will not receive discount on phones. It could also be a discount based on specific categories or brands.

Looking forward to your recommendations.

Best regards.

Discounts and special priceses allready work by customer group in opencart so you would not need an extension for that. Only that you have to set them for each product at a time, so maybe what you are looking for is a batch discounts extension, there are some in the extension directory, like: http://www.opencart.com/index.php?route ... 20category and http://www.opencart.com/index.php?route ... 20category
Se which one suits you best.