Q4. a) What do you know about Input Cost, Conversion Cost, and Step Cost? b) Meghna Ltd. purchased a Machine seven years ago at a cost of Tk.1,87,000 which could be used for more five years. The installation charge was Tk.13,000 and estimated scrap value would be Tk.20,000. The Company now wants to replace the Machine by a new one. Present realizable value of the old one is expected to be Tk.40,000. Determine the amount of Sunk Cost if it is replaced now