While on vacation, a tourist rents a bike for 3 hours and goes horseback riding for 4 hours and pays a total of $130. A different tourist goes to the same places, renting a bike for 8 hours and horseback rides for 2 hours and pays $208. What is the hourly cost of renting a bike? Answers must include the dollar sign Do not write in "per hour", only a cost with the dollar sign. (Example: $15). *