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Invoices

Costs, Revenues & Profit

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1 Revenue

a) Formulae to calculate and understand the relationship between: • total revenue • average revenue • marginal revenue.

b) Price elasticity of demand and its relationship to revenue concepts, including calculations.

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2 Costs

a) Derivation of short-run cost curves from the assumption of diminishing marginal productivity.

b) The law of diminishing returns.

c) Formulae to calculate and understand the relationship between:

• total cost • total fixed cost • total variable cost

• average (total) cost • average fixed cost • average variable cost

• marginal cost.

d) The relationship between:

• marginal product and marginal costs

• average products and average cost

• total product and total cost

• short-run and long-run costs.

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3 Economies and diseconomies of scale

a) The relationship between long-run cost curves and economies/diseconomies of scale.

b) Minimum efficient scale.

c) Distinction between internal/external economies of scale.

d) Sources of internal economies of scale:

• financial • technical • managerial • marketing • purchasing • risk bearing.

e) Sources of external economies of scale:

• availability of skilled labour • access to transport links • sharing knowledge.

f) Sources of diseconomies of scale:

• communication problems • coordination problems • X-inefficiency. 

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4 Profits and losses

a) The distinction between normal profit, supernormal profit and losses.

b) Short-run and long-run shutdown points

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