Isabel Owns a House,which She Advertises for Sale for $300,000

Isabel owns a house,which she advertises for sale for $300,000.On April 1,Jon-Pierre offers Isabel $280,000 for the house.On April 5,Isabel has delivered to Jon-Pierre at his office a form that includes additional terms but does not state a price.At 9 a.m.on April 6,Jon-Pierre signs the form and gives it to Karla,his administrative assistant,with instructions to mail it.At 10 a.m.,Isabel calls to tell Jon-Pierre that the deal is off.The next day,Karla mails the signed form to Isabel.When Isabel refuses to sell the house to Jon-Pierre,he files a suit against her,alleging breach of contract.Isabel claims that there was no contract.What are arguments supporting each party's position What is the court likely to rule Explain.