Beverly and David agree verbally that David will custom$-$make an exercise machine based on Beverly's specifications, that Beverly will pay David $$1,200$ for it$,$ and that David will guarantee for a year the machine's functioning. David draws up a written contract that includes all their verbal agreements except for the one$-$year warranty. Beverly and David sign the contract. Six months after Beverly pays for and takes possession of the machine, it stops working. David's verbal one$-$year warranty is

not binding because it was not included in the contract written after their verbal agreement.

binding because warranties do not have to be in writing to be binding.

binding because the contract involved a dollar amount higher than $$500.$

none of these