Need help solving this.

Direct mail advertisers send solicitations (junk mail) to thousands of potential customers hoping that some will buy the company's product. The response rate is usually quite low. Suppose a company wants to test the response to a new flyer and sends it to 2,000 randomly selected people. The company gets orders from 104 of the recipients and decides to do a mass mailing list to everyone on its mailing list of over 200,000. Create a 95% confidence interval for the percentage of those people who will order something.The company is 95% confident that the proportion of people who may buy something is between _% and _%