3. As part of a school project, Akio wants to find the average cost of renting a newly released videotape from video rental stores in his neighborhood. He surveys 4 stores and finds the cost of renting a newly released videotape from the 4 stores to be $3.50, $3.40, $3.50, and $3.00, respectively. Using this data, what is the average cost of renting a newly released videotape from these 4 stores?