IF you have 2 goods, that are perfect one to one substitutes, and the
Perfect substitutes are those commodities that can be replaced perfectly in place of another.
Consumer surplus refers to the additional money and satisfaction that a consumer gets when what he pays for a commodity is lower than what he is willing to pay.
To understand what happens to consumer surplus when there is a price rise in one of the substitues.
We need to understand that when there is an increase in the price of a substitute good, a consumer will just shift to the consumption of the other commodity as it will give him the same level of satisfaction.
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