Michigan Compiled Laws, Chapter 440. Uniform Commercial Code § 440.2201

Sec. 2201. (1) Except as otherwise provided in this section, a contract for the sale of goods for the price of $1,000.00 or more is not enforceable by way of action or defense unless there is a writing sufficient to indicate that a contract for sale has been made between the parties and signed by the party against whom enforcement is sought or by his or her authorized agent or broker. A writing is not insufficient because it omits or incorrectly states a term agreed upon but the contract is not enforceable under this subsection beyond the quantity of goods shown in the writing.

(2) Between merchants, if within a reasonable time a writing in confirmation of the contract and sufficient against the sender is received and the party receiving it has reason to know its contents, it satisfies the requirements of subsection (1) against the party unless written notice of objection to its contents is given within 10 days after it is received.

(3) A contract that does not satisfy the requirements of subsection (1) but is valid in other respects is enforceable in any of the following circumstances: