First published by Money Metals here: https://www.moneymetals.com/news/2018/11/16/silver-miners-cost-higher-market-price-001654

The Primary Silver Miners lastest results were quite dismal as their All-In Sustaining Costs to produce silver were considerably higher than the market price. Many of the silver miners production costs increased in the third quarter of 2018 due to higher energy, material, and labor costs.