Abstract: A computerized method and system for incentivized sale and purchase of quantity based consumer goods at multiple purchase opportunities over extended period of time is disclosed. The method comprises transmitting an offer to a consumer device, the offer comprising an item, price per item, a quantity, and a duration, selling, through the consumer device, the offer to a consumer, storing the consumer and the offer in a database, uniquely identifying the consumer through the consumer device at a point of sale, exchanging a number of the item with the consumer at the point of sale at the price per item, the number being less than or equal to the quantity, reducing the quantity associated with the offer in the database by the number to a remaining quantity, and honoring the offer at the point of sale for the duration at the remaining quantity.