Probleas: $($a$)$ A company makes Tk$,5,000$ profst from Tk$.60,000$ sales. Its fixed costs are Tk$,15,000.$ What is its break even point $?($b$)$ A company has sales of Tk$,1,00,000,$ fixed costs of Tk$.20,000$ and break even point of Tk$.80,000.$ What profit has it made? $($c$)$ A Company has a profit of Tk$\mathrm{.}5,000,$ fixed costs of Tk$.10,000$ and a break even point of Tk$\mathrm{.}20,000.$ What are its sales?