On 1 January 2021, HK Trading commenced a retail business, which buys and sells fuel. He started the business by purchasing 7484 liters of fuel. The fuel was purchased at a cost of $1.6 per litre. During the year, all the fuel was sold for $6.6 per litre. By the end of the year, the cost of the fuel was $5.7 per litre. Required What is the operating profit/loss made during the period?