Extract B (lines 6–7) states: ‘the average monthly wholesale price of battery-grade lithium carbonate in China has fluctuated significantly, from 124,500 RMB per tonne in September 2021 to 568,200 RMB per tonne in November 2022’.
Calculate the lithium carbonate price index for November 2022, if September 2021 is taken to be the starting point (base period with an index value of 100). Give your answer to the nearest whole number.