Quantity Discounts for osCommerce v3.0.

My Quantity Discounts contribution permits you to offer discounts that are structured many different ways:

* By total number of items purchased
* By number of items purchased, counting per item
* By number of items purchased, counting per category
* Counting by items or by number of dollars spent, in any of the ways above
* Specifying the discount as a percentage, a flat dollar figure or dollars per item

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