53-6-9. Impossibility of ascertaining consideration, effect.
Where a contract provides an exclusive method by which its consideration is to be ascertained, which method is on its face impossible of execution, the entire contract is void.
Source: CivC 1877, §913; CL 1887, §3537; RCivC 1903, §1231; RC 1919, §846; SDC 1939, §10.0505.