Nel owns a manufacturing company in Chicago. He purchases a new press from a press manufacturer in New Orleans. The manufacturer does not provide delivery service, so Nel contracts with Mike to load the press on a trailer and transport the press to Nel's factory in Chicago for $7,500. Mike loads the press on his trailer, and drives the press to Memphis. He stops in Memphis, calls Nel, and tells Nel he will require payment of an additional $1,500 in order to deliver the press to Chicago. Nel agrees to pay an additional $1,500. Mike delivers the press. Chose the best answer.

Group of answer choices

Nel has to pay the additional $1,500 because the new price was bargained for.

Nel has to pay the new price because Mike relied upon the promise to pay an additional $1,500.

The promise to pay an additional $1,500 is unenforceable because Mike had a pre-existing duty to deliver the press to Chicago.

The promise to pay an additional $1,500 is unenforceable because it was not confirmed in writing.