What does "Quantity/Case" and "Minimum Quantity" mean?

For example, an item has Quantity/Case as 12 and Minimum Quantity is 6. Then Quantity/Case means that it is prepackaged as 12 pieces per case (or bag). The Minimum Quantity you must purchase is at least 6 pieces for that item. Quantity/Case is information for our volume buyers who receive discounts when buying in bulk and by the case (or bag). For volume discounts, please visit our Volume Pricing Discount Guide Line page.

Is "Unit Price" the price for one piece or one case?

Unit Price is the price for one piece and the Minimum Quantity is the number of pieces you must at least purchase for that specific item.