The correct answer is 'money'. When someone 'barters' something, they trade it using goods or services. For instance, if I were to 'barter' for an apple, I might give you an orange or something you thought was of equal value, or I might also do a favor for you in return for it.
Lime52 is correct, the answer is money. Bartering is still taxable by the government-they want their cut of everything so require that bartered goods be reported and sales tax is supposed to be paid for the cost of their value.
