On February 1^st,Frank's Fedora Manufacturers Sends an Offer to Metropolitan

On February 1^st,Frank's Fedora Manufacturers sends an offer to Metropolitan Outfitters by letter with all price,quality,quantity and delivery terms clearly stated,indicating that the offer will remain open until October 1^st.On September 1^st Metropolitan sends an acceptance of the offer to Frank's with no material alterations to any of the stated terms in the offer.The acceptance makes the contract valid and enforceable.