Mathematics · Profit and Loss

A faulty weighing machine reads 1 kg when only 900 gm is actually placed on it. A shopkeeper originally marked up his goods by 20% and weighed using this faulty machine. However, he was caught by the metrology department, which ordered him to repair his machine and penalized him by forcing him to sell at a 20% discount on the cost price. If a customer now pays ₹36 for 1 kg of goods after the raid, how much would they have paid for the same quantity before the raid?