$.$ ABC Refining extracts minerals from ore mined at two different sites $($Site $1$ and Site $2).$

$$ Ore mined from Site $1$ costs $$95$ per ton, while ore from Site $2$ costs $$125$ per ton to mine.

$$ Each ton of ore from Site $1$ contains $17\%(\mathrm{.}17)$ copper, $21\%(\mathrm{.}21)$ zinc, and $14\%(\mathrm{.}14)$ magnesium.

$$ Each ton of ore from Site $2$ contains $29\%(\mathrm{.}29)$ copper, $24\%(\mathrm{.}24)$ zinc, and $11\%(\mathrm{.}11)$ magnesium. What does each variable $($x$)$ and the objective function equal to$?$