Suhani works as a designer in an export house. As per the terms of an order received by the export house, she has to get 1,000 units of denim jackets made in 15 days @ ₹ 2,000 per jacket. She is able to complete her target production in 20 days because in order to complete the order in 15 days she would have made the workers work over time. As a result, the cost of production per jacket may have increased by ₹ 100.
Is Suhani efficient in her work? Explain by giving a suitable reason in support of your answer.