1 converts written data into sound waves. 2  converts the sound waves from a voice into a digital signal. 3  converts letters from the keyboard into digital format. 4  converts digital sound waves into analog sound waves.
Travel agencies make their money in a variety of ways. The products agents sell have built-in fees that result in a profit for the agency. The amount of the fees and the ways in which they are earned and distributed differ by the type of product sold and the suppliers who provide that product to the agency.
The U.S. Bureau of Labor Statistics reports that the average income of a Travel Agent was $30,570 as of May 2008. The lowest-paid 10 percent of Travel Agents earn less than $18,770 annually, while the highest-paid 10 percent are paid more than $47,860.