Daria sells televisions. She earns a fixed amount for each television and a additional $15 if the buyer gets an extended warranty. If Daria sells 11 televisions with extended warranties, she earns $1,045. How much is the fixed amount Daria earns for each television.

Dana wants to identify the favorite professional baseball team of people in her community. she stands outside a local sporting goods store and asks every other person who enters, "what is your favorite professional baseball team? " will the results of her survey be valid? explain.