The quantity discounts (Quantity Discount) means that the lower the price. The sales prices that are set by the item or quantity-based discounts, the amount purchased. If in the buyer will receive the higher rate of discount.
The volume discounts (Quantity Discount) means a reduction in price from the sale price. The volume discount or purchase amount. If you buy in bulk, the buyer will receive the higher rate.
The quantity discount (Quantity Discount) refers to the price down from a price set. The quantity discount goods or money, buy. If you buy in large buyers will get a discount rate higher.