Costos FIJOS, Costos VARIABLES, Costos MARGINALES - Explicado para principiantes!

Main ideas and concepts

• Cost concept in production (bakery example)

  • To produce bread, the bakery incurs expenses such as the kitchen/oven/baker/flour/water/salt, etc.
  • If you produce, you have costs; if you don’t produce, you don’t incur production-dependent costs (but fixed costs may still apply).

• Two categories of costs

  • Variable costs (costos variables)
    • Incurred only when producing.
    • Change with the quantity produced.
    • Examples: flour, yeast, water, salt.
  • Fixed costs (costos fijos)
    • Must be paid even if production is zero.
    • Do not change with the quantity produced (within the assumed time horizon).
    • Examples: rent of premises, manager’s salary, taxes.

• Total cost (costo total)

  • Computed as: Total Cost = Fixed Costs + Variable Costs
  • Relationship/shape described:
    • Fixed cost line: constant regardless of quantity.
    • Variable cost line: increases as quantity increases.
    • Initially, the increase in variable cost per extra unit becomes smaller, then later the next units become more expensive.

• Diminishing marginal productivity

  • As production rises, marginal cost behavior changes due to diminishing marginal productivity:
    • Early production: additional units can add cost at a decreasing rate (relative to earlier units).
    • Later production: producing one more unit becomes increasingly expensive.

• Marginal cost (costo marginal)

  • Definition: the cost of producing one additional unit (e.g., one more loaf).
  • Key claims:
    • The first loaf has the highest marginal cost, because large setup expenses are required (oven, rent, hiring, etc.).
    • The second loaf costs less than the first, because setup costs don’t need to be repeated.
    • As production increases:
      • Marginal cost can decrease when ingredients are bought more efficiently in bulk.
      • Eventually, marginal cost can increase again due to diminishing marginal productivity.

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Methodology / implied calculation steps

• To compute total cost for each production level

  • For each quantity of output (e.g., produce x loaves):
    • Determine Fixed Costs (constant).
    • Determine Variable Costs (depends on x).
    • Compute: Total Cost(x) = Fixed Cost + Variable Cost(x).

• To compute marginal cost

  • For consecutive production quantities x and x + 1:
    • Compute the difference in total cost:
      • Marginal Cost(x+1) = Total Cost(x+1) − Total Cost(x)
    • Interpret this difference as:
      • The increase in total cost from producing one additional unit.
  • Relationship emphasized:
    • When fixed costs remain constant, marginal cost equals the change in variable cost:
      • Marginal Cost(x+1) = Variable Cost(x+1) − Variable Cost(x)

• Purpose of knowing marginal cost (as preview)

  • Marginal cost helps determine how many loaves to sell to maximize profits.
  • The video notes that this is discussed in the next video.

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Speakers / sources featured

• No specific named speaker or external source is mentioned in the provided subtitles.
• The explanation appears to be a general instructional presentation with no identifiable individual.