When a contract does not determine the amount of the consideration or the method by which it is to be ascertained or when it leaves the amount thereof to the discretion of an interested party, the consideration must be so much money as the object of the contract is reasonably worth.
Mont. Code Ann. § 28-2-813
Determination by interested party
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.