SP
= Sales Price
CP = Cost Price
MP = Marked Price
Cost Price:
CP = Cost Price
MP = Marked Price
Cost Price:
The price, at which an article is purchased, is called its cost price.
Selling Price:
The price, at which an article is sold, is called its selling prices.
Profit or Gain:
If S.P. is greater than C.P., then there is a profit or gain.
Loss:
If S.P. is less than C.P., then there is a loss.
Points to
Remember:
· If an article is sold at a gain of 20%, then SP = 120% of CP
· If an article is sold at a loss of 20% then SP = 80% of CP
· If an article is sold at a loss of 20% then SP = 80% of CP
Important Formulas for Quick Reference :
· Gain = (S.P.) 
(C.P.)
· Loss = (C.P.) 
(S.P.)
· Loss or gain is
always calculated on C.P.
· Gain Percentage:
(Gain %)
· Loss Percentage:
(Loss %)
· Selling Price: (S.P.)
· Selling Price: (S.P.)
· Cost Price: (C.P.)
· Cost Price: (C.P.)
· If a person sells two items at the same price; one at a gain of x % and
another at a loss of x %, then the seller always incurs a loss expressed as
· If a trader professes to sell his goods at cost price, but uses false
weights, then
Gain%=[Error( True Value  Error )×100]%
Example:
A man bought 27 tables for ₹5940 and sold them at a
gain equal to the selling price of 5 tables. Find gain.
Explanation:
C.P.
= ₹5940
Let
S.P. of one table = ₹x
Therefore
S.P. of 27 table= ₹ 27x
Gain
= ₹5x (given)
Gain % =

Gain x 100


C.P.

= ^{5x}/_{22x} × 100
= 22.8