Answer:
Clark is entitled to damages and it can request a summary judgment against Hess. Initially Clark failed to deliver the proper oil, but then it offered to deliver the proper oil on February 1, which was one day after the original date set by the contract. Clark offering a new shipment of oil is considered an offer to cure. When Clark again tried to deliver on February 6, but the shipment wasn't rejected due to technical specifications but simply because Hess decided to do so.
Under UCC section 2-508(2), a seller is allowed reasonable time to cure after the expiration of a contract it the seller believes that it can reasonably delivered the promised goods. One single day after the expiration date of the contract (February 1) or 6 days after (February 6) are considered reasonable times to cure an offer, and Clark's tests indicated that the product was good. So Clark meets the two requirements to sue Hess since; it offered to cure in a reasonable time and had a good product to deliver.