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Identify the error in this cost formula: Total Cost = Number of Layers + Cost per Layer * 2

medium📝 Formula Fix Q6 of 15
PCB Design - Multi-Layer PCB Design

Identify the error in this cost formula: Total Cost = Number of Layers + Cost per Layer * 2

AThe formula uses division instead of multiplication
BThe formula adds layers instead of multiplying all costs
CThe formula should subtract cost per layer
DThe formula correctly calculates total cost
Step-by-Step Solution
Solution:

  1. Step 1: Analyze formula components

    The formula adds number of layers to twice the cost per layer.

  2. Step 2: Identify correct operation

    Total cost should multiply number of layers by cost per layer, not add.

  3. Final Answer:

    The formula adds layers instead of multiplying all costs -> Option B

  4. Quick Check:

    Correct formula = layers * cost per layer [OK]
Quick Trick: Total cost = layers multiplied by cost per layer [OK]
Common Mistakes:
MISTAKES
  • Adding layers and cost
  • Using subtraction
  • Confusing multiplication with division

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