Ann: Primary Crusher Bearing Replacement, page-17

"The pit progression has led to a significant decrease in stripping ratio, which has meant that ore stockpiles for future processing are now rapidly accumulating. At the time of writing the stockpiles have grown considerably to 1.4 million tonnes and is rapidly approaching five months processing. These stockpiles are anticipated to continue to grow allowing processing to continue at full capacity until approximately the third quarter of 2020.

With a significant increase in the ore mined and the ability to preferentially treat higher grades, revenue has increased substantially. This is anticipated to continue through to the middle of 2019. With costs declining as mining reduces then ceasing,"

So the mining costs will cease by mid 2019 and processing of ore will run for 5 quarters until q3 2020 with no mining costs.