Which of the following is not an underlying assumption of cost$-$volume$-$profit analysis? Multiple Choice Selling price is constant. In multiproduct companies, the mix of products sold remains constant. Variable cost per unit varies inversely with changes in the level of activity. Total fixed costs are constant within the relevant range.$(23)$ What is the relevant range in the context of cost$-$volume$-$profit $($CVP$)$

analysis?

The range of volume over which the varlable cost per unit is expected to

increase

The range of volume over which the variable cost per unit is expected to

decrease

The range of volume over wikth the variable cost per unit is expected to

remain the same

The range of volume over which the fixed cost per unit is expected to

remain the same