- Discount is a reduction given on marked price.
- Discount = Marked price - Sale price
- Profit = SP - CP, Profit %
- Loss = CP - SP, Loss %
- CP = Buying Price + Overhead expenses.
- Sales tax = Tax % of bill amount.
- Interest is the extra money paid by bank or post offices on money deposited with them.
- The interest is calculated on the amount of previous year is known as compound interest.
(i) Amount when interest is compounded annually.
(ii) Amount when interest is compounded half yearly