Fill in the missing components in the reaction below. 
Definitions:
Double Coincidence
A situation in a barter system where two parties each hold an item the other wants, facilitating an exchange without the need for money.
Barter
The exchange of one good or service for another good or service; a trade.
M2
A measure of the money supply that includes all elements of M1 (cash and checking deposits) plus savings deposits, money market mutual funds, and other time deposits.
M1
A segment of the money supply encompassing all tangible currency, such as bills and coins, in addition to demand deposits, checking accounts, and negotiable order of withdrawal (NOW) accounts.
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