The price, at which an article is purchased, is called its cost price, abbreviated as C.P.
Selling Price:
The price, at which an article is sold, is called its selling prices, abbreviated as S.P.
Profit or Gain:
If S.P. is greater than C.P., the seller is said to have a profit or gain.
Loss:
If S.P. is less than C.P., the seller is said to have incurred a loss.
IMPORTANT FORMULAE
- Gain = (S.P.) - (C.P.)
- Loss = (C.P.) - (S.P.)
- Loss or gain is always reckoned on C.P.
- Gain Percentage: (Gain %)
Gain % = 
Gain x 100 
C.P. - Loss Percentage: (Loss %)
Loss % = Loss x 100 C.P. - Selling Price: (S.P.)
SP = 
(100 + Gain %) x C.P 
100 - Selling Price: (S.P.)
SP = (100 - Loss %) x C.P. 100 - Cost Price: (C.P.)
C.P. = 100 x S.P. (100 + Gain %) - Cost Price: (C.P.)
C.P. = 100 x S.P. (100 - Loss %) - If an article is sold at a gain of say 35%, then S.P. = 135% of C.P.
- If an article is sold at a loss of say, 35% then S.P. = 65% of C.P.
