The rates of admission to a movie show is $ 8 for an adult , children under the age 13 is $ 5 and the matinee ( before 6 pm ) is $ 3. In our case Janelle is a child since she is below the age of 13 and therefore will pay $ 5, while Marquita is an adult thus will pay $ 8. Therefore, $ 8 + $ 5 = $ 13
Therefore the total cost for the show will be $ 13