2. Company A is a trader in computer. In June 2018, this company sent a proposal to his most frequent client, Company B, saying that it was offering to sell 100 laptops, XYZ brand, and latest version for US$1000/a laptop. The detail description of a laptop was in the Exhibit A attached with the contract. After receiving Company A's letter, Company B replied that Company B was willing to buy 100 laptops, XYZ brand, and latest version for US$1000/a laptop, however Company B wanted another 100 laptops of the same brand with a 5% discount. Was there a contract between Company A and Company B? (3 points) *