Ann: Revised Shipping Strategy Yields Substantial Cost Reduction, page-101

Its also worth remembering that including inferred resources E25 is a 70 year mine @ 3.9mt/yr. On currently installed capacity its 200yrs. There are going to to have some ups and downs in price received.

The table below is the prices quoted by OMH in its quarterly updates as the 44% CIF price over the last five years. There was some inventory buildup in China that lowered the price Pre-Covid. Covid has continued to impacted steel production and prices. If we consider the average across 2017 to 2019 as normal, the average is $6.32. Current price increases are not pushing to new high's but returning to prices normally seen in pre-covid times. The rolling 5-year average from Dec2016 to Sep2020 is $5.86 These are however not the price that E25 will receive because there are grade adjustments to the 44% pricing/dmtu and shipping back to FoB pricing.

1		30-Sep-2016	.20
2	31-Dec-2016	$7.79
3	31-Mar-2017	$5.21
4	30-Jun-2017	$5.87
5	30-Sep-2017	$6.54
6	31-Dec-2017	$6.88
7	31-Mar-2018	$8.76
8	30-Jun-2018	$6.83
9	30-Sep-2018	$7.29
10	31-Dec-2018	$6.96
11	31-Mar-2019	$6.46
12	30-Jun-2019	$5.74
13	30-Sep-2019	$5.12
14	31-Dec-2019	$4.20
15	31-Mar-2020	$4.27
16	30-Jun-2020	$5.02
17	30-Sep-2020	$4.39
18	31-Dec-2020	$4.21
19	31-Mar-2021	$5.32
20	30-Jun-2021	$5.15
21	30-Sep-2021	$5.22

The historical prices also don't factor in that only some grades of Manganese ore are suitable for making EV batteries with. Current predictions are a many-fold increase in manganese demand for EV batteries. BloombergNEF has guessed this at 9.3x between 2021 and 2030.
The picture was from greencarcongress dot com and an article from 1 July titled "BlombergNEF: battery metals rebounding; by 2030, annual Li-ion battery demand to pass 2TWh". A google search on this should work if the link below doesn't.
BloombergNEF: battery metals rebounding; by 2030, annual Li-ion battery demand to pass 2TWh - Green Car Congress

But of course DYOR