Which of the following statements about cost-volume-profit analysis is true? If a company expands operations outside of its relevant range, variable cost per unit could change, but total fed costs will always stay constant. The contribution margin ratio represents the percentage of sales revenue available to contribute towards covering variable and fixed costs To increase the contribution margin ratio, a manager should decrease fixed cost At the breakeven point, total sales revenue equals total costs. Identify the cost scenario that is best represented by the graph shown Sales salary costs for a clothing store, each member of the sales staff is paid $600 per week plus 4 of net sales Advertising costs for a grocery store, where the store runs a four-page color insert in the local newspaper once per week Customer service staff are paid $12.50 per hour Ol disposal fees for an automotive maintenance company, Including a $100 base foe plus a usage too. The usage fee is scaled to encourage waste reduction up to 10 barrels costs Sa per barrel. 11-as barrels O costs $12 per barrel, and more than 25 barrels costs $10 per barrel