A school principal places orders for 85 chairs and 25 tables with a dealer. Each chair cost ₹180 and each table cost ₹140. If the principal has given ₹2500 to the dealer as an advance money, then what amount to be given to the dealer now?

Number of chairs = 85
Cost of one chair = ₹ 180
Cost of 85 chairs = ₹ (85 × 180)
Number of tables = 25
Cost of one table = ₹ 140
Cost of 25 tables = ₹ (25 × 140)
Total cost of all chairs and tables = ₹(85 × 180 + 25 × 140)
= ₹ (15300 + 3500) = ₹ 18800
Money given in advance = ₹ 2500
∴ Balance money to be paid to the dealer = ₹ 18800 – ₹ 2500 = ₹ 16300