Dorothy Jewelry manufactures jewelry. In October, Dorothy is planning to make $500$ rings, $400$ bracelets, and $210$ pendants. Each ring requires $3$ ounces of gold and $2$ semi$-$precious stones. Each bracelet requires $4$ ounces of gold and $4$ semi$-$precious stones. Each pendant requires $3\mathrm{.}5$ ounces of gold and $1$ semi$-$precious stone. The company can purchase the $10$ kgold it uses in its manufacturing for $$217$ an ounce, and can purchase a lot of $100$ semi$-$precious stones for $$3090.$ What is the standard cost for direct materials per pendant?

$$247\mathrm{.}90$

$$3307\mathrm{.}00$

$$759\mathrm{.}50$

$$790\mathrm{.}40$