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B. Quantity discount

Explanation:

Quantity discount can be referred to a strategy for enticing customers to make more purchases for an item being offered at a cheaper price per unit for bulk purchases.

In simple terms, a seller reduces the price per unit for an item, if a buyer is buying a certain bulk quantity of that item.

For example, if a pack of snacks is sold at $5 per unit for 1 purchase, the seller can decide to give incentive to customers in the form of quantity discount by proposing that anyone making a purchase of more than 5 units would pay $3 per unit instead if $5 per unit for 1 pack.

This is what is called quantity discount.

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