Accounting Principles II – Cost-Volume-Profit Relationships

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Study GuideAccounting Principles IICost-Volume-ProfitRelationships1.Cost BehaviorCost behaviorexplains how a cost changes when the level of activity changes.Activity can mean units produced, units sold, hours worked, or services provided.Some costsstay the same, while othersincrease or decreaseas activity changes.Understanding cost behavior helps managers:Prepare budgetsMake forecastsEstimate profitsChoose between different business options1.Fixed CostsFixed costsremain the samein total, no matter how many units are produced or sold.Thetotal fixed cost does not changeThefixed cost per unit changesas activity changesFor example, if production increases, the fixed cost is spread over more units, so thecost per unitdecreases.Example of a Fixed CostStraight-line depreciationis a fixed cost.

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Study GuideA machine may be used to produce 1,000 units or 10,000,000 units in a month, but the depreciationexpense stays the same because it depends ontime, not usage.2.Variable CostsVariable costschangein totalwhen activity changes.Thecost per unit stays the sameThetotal cost increases or decreaseswith activityExample of a Variable CostDirect materialsare a variable cost.If:One chair requires1 yard of fabricFabric costs$5 per yardThen:1 chair costs$5

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Study Guide10 chairs cost$50100 chairs cost$500The cost per unit stays at $5, but the total cost rises as more chairs are made.Comparing Fixed and Variable Costs GraphicallyWhen shown on a graph:Total fixed costsappear as aflat horizontal lineTotal variable costsslope upward as activity increases

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Study Guide3.Mixed CostsMixed costscontainboth fixed and variable components.Example of a Mixed CostA phone plan charges:$1,000for the first800 calls$0.10 per callafter 800 callsIf a company makes2,000 callsin March:Extra calls = 1,200Extra cost = 1,200 × $0.10 = $120Total cost = $1,120Because mixed costs behave like both fixed and variable costs, they must beseparatedinto twoparts before analysis.

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Study Guide4.Methods Used to Analyze Mixed CostsTo separate mixed costs, companies use past data and the following methods:Scatter Diagram MethodAscatter diagramplots:Activityon the horizontal (x) axisCoston the vertical (y) axisEach dot represents one observation.A line is drawn through the points to estimate the cost pattern.Where the line meets the vertical axis =fixed costTheslope of the line=variable cost per unitExample

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Study GuideUsing two data points:36,000 gallons → $14,00060,000 gallons → $20,000Change in cost = $6,000Change in activity = 24,000 gallonsVariable cost per unit =$0.25Estimated fixed cost =$5,000HighLow MethodThehighlow methoduses only:Thehighestactivity levelThelowestactivity level
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