McDonald, owner of Sports Craft, a sporting goods store, contracted to purchase 200 footballs for $ 2,000

Question:

McDonald, owner of Sports Craft, a sporting goods store, contracted to purchase 200 footballs for $ 2,000 from the Pro Manufacturing Co. With no explanation, Pro Manufacturing shipped 100 footballs instead of the 200 called for in the contract. McDonald had already prepaid $ 1,000 on the purchase. What sales remedy or remedies could McDonald pursue?