PRICE TREND . The WPI for minerals (base 2011-12=100) stood at 197.2 for the year 2021-22 and the corresponding index was 164.9 for the year 2020-21. The minerals included in the wholesale price index are bauxite, chromite, iron ore, copper conc., lead conc., garnet, zinc conc, manganese ore, limestone, phosphorite and sillamanite.