AMDM Question (Mathematics)

Question

Kelly works two jobs. She usually works at a retail store for 5 hours during the day and is paid $22.51 per hour by the store. In the evening she works at a restaurant as a manager for 7 hours and is paid $11.24 per hour. How much does she make on average per hour for the day?

Answer 1

[(5)(22.51) + (7)(11.24)] / 12 = ?