2 sentences

1. 双方商定了合同的细节。

   shuāng​fāng shāng​dìng le hé​tong de xì​jié.

   Both parties have agreed on the details of the contract.

   Source: Dong Chinese Dictionary

2. 双方商定将旧的合同作废。

   shuāng​fāng shāng​dìng jiāng jiù de hé​tong zuò​fèi.

   Both parties agreed to void the old contract.

   Source: Dong Chinese Dictionary