SSR Mining is fifth with reported AISC of $1,006/oz in Q3 2021, down 3% compared to Q3 2020 ($1,034/oz). Given this strong performance, the company reduced its 2021 AISC guidance from $1,050 - $1,110 per gold equivalent ounce to $1,000 - $1,040 per gold equivalent ounce. Gold Field 's all-in sustaining costs increased by 5%, from …