Once the break$-$even point has been reached, net operating income will increase by the amount of the $\_\_\_\_\_$ for each additional unit sold.

multiple choice $1$

unit contribution margin

unit selling price

variable expense per unit

fixed expense per unit

Knowledge Check $02$

Break$-$even point is the level of sales at which $\_\_\_\_\_\_.$

multiple choice $2$

total profits equals total costs

total profits exceed total costs

total revenue equals total costs

total sales equal total projections