Identify whether each of the following is best described as a fixed, variable, or mixed cost with respect to product units. 1. Hourly wages of assembly-line worker. 2. Rubber used in making tennis balls Variable Fixed Mixed 3. Milk used in making ice cream 4. Electricity used in factory building 5 Cameras used in making smartphones 6. Peanuts used in making trail mix. 7 Insurance on factory building.