Let the price of sugar be Rs 100 and monthly sales be 100 units. Then,
total revenue = 100 × 100 = Rs 10000.
And, new revenue = 90 × 130 = Rs 11700.
Increase in revenue = 11700 – 10000 = Rs 1700.
Hence, percentage increase in revenue = (1700/10000) × 100% = 17%.
