• Discount is a reduction given on marked price. Discount = Marked Price – Sale Price (S.P.) • Discount can be calculated when discount percentage is given. Discount = Discount % of Marked Price • Additional EXPENSES made after buying an ARTICLE are included in the COST price and are known as overhead expenses. cost price = buying price + overhead expenses • Sales Tax is charged on the sale of an item by the government and is added to the Bill Amount. Sales tax = Tax% of sale amount These days, however, the selling prices (known as MRP) include the tax known as VAT (Value Added Tax). • The interest COMPOUNDED annually is the interest calculated on the previous year’s amount A, (A = P + I). • The time period after which the interest is added each time to form a new principal is called the conversion period. • When the interest is compounded half yearly, there are two conversion periods in a year of duration 6 months each. • Amount when interest is compounded annually is n R A P1 100         Step-by-step explanation:plz mark as brain list or brain star