Choose the correct answer for each of the following costs, to indicate whether it is a fixed cost or a variable cost for a factory. Group of answer choices Cost of raw materials [ Choose ] Salary for a full-time factory supervisor. The supervisor is required to work 9 - 5 pm despite the level of production. [ Choose ] Electricity to power factory machines [ Choose ] Wages for assembly line workers (employed on a casual basis) [ Choose ] Monthly rent of the factory building