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Daily Challenge — September 3, 2026

cost accounting · mixed

Overbrook Defense Ltd. is a mid-sized defense contractor specializing in the production of ruggedized tactical body armor panels sold to government and military clients at $216 per unit. Management wants to assess overall profitability at current production levels and determine the minimum number of units that must be sold to cover all costs.

Correct Answers

net Income

$5,917,800.00

break Even Sales

$694,956.52

break Even Units

3,218

contribution Margin Per Unit

138

Step-by-Step Solution

MIXED PROBLEM — Contribution Margin + Break-Even

CONTRIBUTION MARGIN INCOME STATEMENT:
  Sales (46,100 units × $216.00)         $9,957,600.00
  Less: Variable Costs (46,100 × $78.00) $3,595,800.00
  ─────────────────────────────────────────────────────────
  Contribution Margin                                   $6,361,800.00
  Less: Fixed Costs                                     $444,000.00
  ─────────────────────────────────────────────────────────
  Net Income                                            $5,917,800.00

Per Unit:
  CM per Unit = $216.00 − $78.00 = $138.00
  CM Ratio    = $138.00 ÷ $216.00 = 63.89%

BREAK-EVEN ANALYSIS:
  Break-Even Units = Fixed Costs ÷ CM per Unit
  Break-Even Units = $444,000.00 ÷ $138.00 = 3217.3913 → 3218 units (rounded up)

  Break-Even Sales = Fixed Costs ÷ CM Ratio
  Break-Even Sales = $444,000.00 ÷ 63.8889% = $694,956.52