Assume for purposes of this question only that after hearing what Tre White has to say on October 19, 2021, Sean immediately responds by saying the following "that's great Tre, I knew your Snow Removal Academy would come through for me. I accept your offer and will get the first $1,300 monthly payment to you by November 1st. Thank you for being such a reasonable businessperson." At this point, do Sean and TWSRA have a valid contract? Why or why not? If they do have a valid contract, what are its terms?