Lacks Stationary is the biggest stationary chain in Indonesia, which has over $500$ branches around Indonesia. Due to high demand for School's new semester, for every $1$ Pen sold, $3$ Pencil are sold. Below is the information about the price, variable cost, and fixed cost of each Stationaries:

$\backslash$table$[[,$Selling Price,Variable Cost,Fixed Cost$],[$Pen$,$$$2\mathrm{.}00,$$$1\mathrm{.}80,$$$15,000$