The Westchester Chamber of Commerce periodically sponsors public service seminars and programs. Currently, promotional plans are under way for this year's program. Advertising alternatives include television, radio, and online. Audience estimates, costs, and maximum media usage limitations are as shown in the attached spreadsheet. To ensure a balanced use of advertising media, radio advertisements must not exceed 50% of the total number of advertisements authorized. In addition, television should account for at least 10% of the total number of advertisements authorized. Using the attached file and a promotional budget of $22,800 and solving this as a linear program, determine the number of commercial messages that should be run on each medium to maximize total audience contact. By how much would audience contact increase if an extra $4500 were allocated to the promotional budget? (Round your answer to the nearest whole number.)