11. The president of A Co. wrote a letter to B Co. offering to sell B Co. a large quantity of steel at a specific price. B Co. did not respond to the letter, but A Co. sent a "sample load" of one tonne that B Co. used in its manufacturing process. A month later, A Co. sent the quantity of steel specified in its letter along with an invoice at the price specified. Is B Co. bound to accept and pay for the steel? Advise the parties