I fear you've mistaken the use of a period as a decimal separator for a thousands separator: https://en.wikipedia.org/wiki/Decimal_separator https://en.wikipedi

I fear you've mistaken the use of a period as a decimal separator for a thousands separator: https://en.wikipedia.org/wiki/Decimal_separator https://en.wikipedia.org/wiki/Decimal_separator. Your numbers are thus off by a factor of 1000. Cobalt is actually $24/kg and nickel is $15/kg. Still not impossible, but you've unintentionally illustrated the problem.