The DoralDoral Company manufactures and sells pens.$$ Currently, $5$ comma $000$ comma $0005,000,000$ units are sold per year at $ $0\mathrm{.}50$$$0\mathrm{.}50$ per unit. Fixed costs are$$$ $900$ comma $000$$$900,000$ per year. Variable costs are $ $0\mathrm{.}30$$$0\mathrm{.}30$ per unit.