Natasha Romanoff is excited, as she has just reached her bre…

Natasha Romanoff is excited, as she has just reached her break-even point for her new business Black Widow Enterprises. The selling price per unit of the dual batons she developed is $28. At this sales volume, her variable cost is $7, while her fixed cost is $12 per unit. When Natalia sells one more unit, she will generate additional income of:                                                     .