northrop is a huge defense firm. litronic manufactures printed circuit boards. northrop requested litronic to submit an offer to sell them certain boards. litronic sent its offer form, stating a price and including its preprinted warranty clause, which limited its liability to 90 days. northrop orally accepted the offer, then sent its own purchase order form, which contained a warranty clause holding the seller liable with no time limit. six months after the goods were delivered, northrop discovered they were defective. northrop sued, but litronic claimed it had no liability because the 90 days had expired. are northrop and litronic in a contract?
