Mathematics · Data Sufficiency

A question is given, followed by three statements labelled I, II and III. Identify which of the statements is/are sufficient to answer the question. Question: What is the total expense when the hostel has 189 occupants? Statements: Total expenses of the hostel consist of two parts: one varies directly with the number of occupants and the other is fixed. I. When it had 150 occupants, its total expense was ₹79,500. II. When it had 240 occupants, its total expense was ₹1,15,500. III. When it had 200 occupants, its total expense was ₹99,000.