You tell a cloth supplier that you'd probably pay three dollars per square yard for 10,000 square yards of a particular cloth if she can deliver it by next Monday. The supplier delivers 10,000 square yards of that particular cloth on Monday morning, and by Monday afternoon you have provided the supplier with a certified check for $30,000. From your conduct, and that of the cloth supplier, it seems that a contract was formed. Moreover, while it might not be clear at exactly what moment you and the cloth supplier reached an agreement, under the UCC that uncertainty does not mean that there was not a contract formed, in fact, a binding contract between you and the supplier occurred when?

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