1. exchange labour services for money;
2. You must hand over in exchange a good or service;
3. a double coincidence of wants;
4. spend a lot of time and effort;
5. make mutually satisfactory swaps;
6. a barter economy is wasteful;
7. commodity generally accepted in payment for goods;
8. prices are quoted and accounts are kept;
9. its purchasing power is eroded by inflation;
10. it's usually but not invariably convenient;
11. cut back on other uses;
12. exceeds its cost of production;
13. by collectively agreeing;
14. the survival of token money;
15. society enforces the use of token money;
16. token money is supplemented by IOUmoney;
17. interest-bearing bank accounts
