Conditional Sales Discount

Summary:

Our client would like to create a discount for their customer with below scenario. For your assistance and advice please how to achieve this.

"Offering one of their customers a 3% discount off to their List price of $9.10 for every case of our Whole Milk 59oz 3 pack sku, if they order a full truck of product (1 full truck = 24 Pallets or 3,168 cases). Can you help us figure out how to build a conditional sales discount of 3% or $0.273/case when customer orders exactly 3,168 cases?"

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