a$.$ What will be BHP$\text{'}$s operating profit from copper next year if the price of copper is $$1\mathrm{.}25,$$$1\mathrm{.}55,$ or $$1\mathrm{.}85$ per pound,

and the firm plans to sell all of its copper next year at the going price?

The operating profit when the price per pound is $$1\mathrm{.}25$ will be $ billion. $($Round to two decimal places.$)$