Avocado Ltd produces small electronic components for kitchen appliances. This year it expects to produce $10000$ units of component X$.$ The variable manufacturing cost of component X is $$2$ per unit and the variable selling and administrative cost of component X is $$3$ per unit. In addition, to produce component X Avocado Ltd incurs annual fixed manufacturing cost of $$50000$ and annual fixed selling and administrative cost of $$60000.$ If the target profit is $$2$ per unit, and using cost plus pricing approach, the mark up percentage based on total variable costs is:a$\mathrm{.}260$ per cent.b$\mathrm{.}80$ per cent.c$\mathrm{.}63\mathrm{.}6$ per cent.d$\mathrm{.}12\mathrm{.}5$ per cent.