Partial answer

The average U.S. family of four pays $1,000 a year for commercial television, as a result of the addition of advertising costs to the prices of brand name products and the deduction of advertising costs from corporate federal tax obligations.

source: George Gerbner, The Global Media Debate: Its Rise, Fall and Renewal. Ablex, 1993.

The average American household had five radios in 1994.

Source: Portrait of the USA. Chapter 12. United States Information Agency.