Rosenthal Company makes and sells products with variable costs of $24 each. Rosenthal incurs annual fixed costs of $315,000. The current sales price is $87. Required: The following requirements are interdependent. For example, the $252,000 desired profit introduced in Requirement c also applies to subsequent requirements. Likewise, the $80 sales price introduced in Requirement d applies to the subsequent requirements. If variable cost rises to $30 per unit, what level of sales is required to earn the desired profit? Express your answer in units and dollars. sales volume in units? Sales volume in dollars?