Cost Price : 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 price,
abbreviated as S.P. 1 Profit or Gain : If S.P. is greater than CR, 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.
Gain = (S.P.) - (C.P.)
Loss = (C.P.) - (S.P.)
Loss or gain is always reckoned on C.P.
Gain% =Gain X 100 C.P.
Loss% =Loss X 100 C.P.
S.P. =100 + Gain% X C.P. 100
S.P. =100 - Loss% X C.P. 100
C.P. = 100 X S.P. 100 + Gain%
C.P. = 100 X S.P. 100 - Loss%
If an article is sad 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.
When a person sells two similar items, one at a gain of say, x%, and the other
at a loss of x%, then the seller always incurs a loss given by :
(Common Loss and Gain%/10)2
If a trader professes to sell his goods at cost price, but uses false weights, then Gain% = Error X 100 % (True Value) - (Error)