EN QUESTION 28 Renting a scooter and paying $30 per day plus $.20 per mile driven is an example of what type of cost? Conversion cost Variable cost Fixed cost Mixed cost QUESTION 29 The contribution format for an income statement: highlights product and period costs. requires the calculation of the gross margin subtotal. is always used in external reporting. provides better support for decision making than a traditional format. QUESTION 30 The cost of training employees in quality improvement processes would be classified as: appraisal cost external failure cost prevention cost internal failure cost