Longstreet Inc. has fixed operating costs of $470,000, variable costs of $2.80 per unit produced, and its product sells for $4.00 per unit. What is the company's break-even point, i.e., at what unit sales volume would income equal costs? a. 411,250 b. 476,073 c. 431,813 d. 453,403 e. 391,667