The list price of a frock is Rs 220. A discount of 20% is announced on it. What is the amount of discount on it and its sale price?

Shankar bought a second hand refrigerator for Rs 2500. He spent Rs 500 on its repairs and sold for Rs 3300. Find his loss or gain per cent.

A shopkeeper purchased 200 bulbs for Rs 10 each. However 5 bulbs were fused and had to be thrown away. The remaining were sold at Rs 12 each. Find the gain or loss per cent.

Meenu bought two fans for Rs 1200 each. She sold one at a loss of 5% and the other at a profit of 10%. Find the selling price of each. Also find out the total profit or loss.

The cost of a pair of roller skates at a shop was Rs 450. The sales tax charged was 5%. Find the bill amount.

Remeeta bought an air cooler for Rs 300 including a tax of 10%. Find the price of the air cooler before the VAT.

Find interest and amount to be paid on Rs 15000 at 5% per annum after 2 years.

Find CI on a sum of Rs 8000 for 2 years at 5% per annum compounded annually.

Find the time period and rate for each.

 A sum taken for 1¹/₂ years at 8% per annum is compounded half yearly.

Find the time period and rate for a sum taken for 2 years at 4% per annum compounded half yearly.