and milo are perfect substitutes in a feed ration for chickens. The same energy is provided by either $1lb$ of corn or $1\mathrm{.}5lb$ of milo. If the price of corn is $$0\mathrm{.}10$ per $lb$ while the price of milc per lb$,$ the cost$-$minimizing producer would:

Use all corn

Use $60\%$ corn and $40\%$ milo

Use half corn, half milo

Use all milo