A stationery stall's day book shows — Pens: 120 sold at ₹15 each. Pencils: 200 sold at ₹6 each. Erasers: 150 sold at ₹8 each. Which item brought in the most money, and how much?

Multiply each count by its price: pens $120\times 15$ = ₹1,800, pencils $200\times 6$ = ₹1,200 and erasers $150\times 8$ = ₹1,200. Pens brought in the most, ₹1,800, even though pencils sold in the largest numbers — the tallest bar in a 'units sold' chart need not be the tallest in a 'money earned' chart. Pencils and erasers happen to tie at ₹1,200, so the count alone can never settle this question.