Lake Shore Department Store chain has hired an advertising firm to determine the types and amount of advertising it should have for its stores. The four types of advertising available are television and radio commercials, Internet and newspaper ads. The retail chain desires to know the number of each type of advertisement it should purchase in order to maximize exposure. It is estimated that each ad or commercial will reach the following potential audience and cost the following amount.

Exposure Cost Advertising (People/Ad or Commercial) ($) C1 Television Commercial 60, 000 15, 000 C2 Radio Commercial 30, 000 6, 500 C3 Newspaper Ad 25, 000 6, 000 Internet Ad 50, 000 7, 000