The document discusses some key difficulties with the barter system, including the lack of coincidence of wants between buyers and sellers, the inability to store perishable goods for long periods, and the impossibility of dividing commodities into small units or making deferred payments. To address these problems, money was invented as a standard medium of exchange in the economy.

9.  In Barter system goods were exchanged
through goods.
 In this process wants of both buyer and the
seller must coincidence.
 This is called Lack of coincidence of wants.
 Lack of coincidence of wants make the
difficulty of Barter system.

11.  Some Goods are Perishable.
 They perish in a short period.
 So it was not possible to store the goods in
Barter system for a long time

12. If we store
in Barter
system

13.  In Barter system we cannot divide all the
commodities into small units.
 It is also one of the problem of Barter system.

15.  In Barter system the value of every commodity
can be measured in terms of other commodity.
 But it is not possible to measure the commodity
value with other commodity.

16.  Deferred payments means future payments.
 Under Barter system future payment for
present transaction was not possible.
 The future exchange involved some difficulties

17. In order to overcome
the discussed
difficulties in barter
system, money was
invented in economy.