National Steel Corporation is a U.S. manufacturer of steel products based in Pittsburgh, Pennsylvania.Among other products, National Steel manufactures rails used in constructing railway tracks.On November 1st, National Steel received a telephone call from a purchasing agent of Bombardier Transportation, Inc., a British manufacturer of railway systems and equipment with its main offices in the city of Derby, United Kingdom (U.K.).Bombardier's agent explained that Bombardier had been awarded a contract by the government of Serbia to construct a light rail transit line from the city of Belgrade to surrounding suburban areas and that Bombardier was interested in using National Steel's rails for the project.Shortly after their conversation ended, National Steel's shipping agent emailed Bombardier a price list that stated that the rails were priced at $200 per rail.After reviewing the price list, Bombardier faxed National Steel a purchase order on November 1st that read: "We order 5,000 rails for $1,000,000 for immediate delivery to our site in Belgrade, Serbia."

The U.S. and Serbia are signatories to the CISG, but the U.K. is not.If National Steel accepts the offer, does the CISG apply to this commercial transaction?Explain fully.