1.3 Cost Behavior and the Relevant Range Flashcards
Relevant range
Defines the limits in which per-unit variable cost remains constant and fixed costs are not changed (the short term)
Variable costs per unit (in the short run)
remain constant regardless of the level of production
Variable costs in total
Increase in direct proportion to the change in volume
Fixed costs in total
remain unchanged in the short run regardless of production
Fixed costs per unit
Decrease as activity level increases
Mixed (Semi-variable) Costs
Combines fixed and variable elements (rental expense with a fixed monthly rate and per mile charge)
What are two examples of non-linear cost function
Fixed cost per unit and step costing
Step costing
Remains constant over small ranges of output, but increase by steps as activity level increases (Salary of production foremen. One shift a day might require 1 foreman while two shifts a day might require 2)
What type of costs can display step costs
Both fixed and variable
If the steps are relatively narrow how are step cost treated
As variable
Marginal cost
The cost incurred by a one unit increase in the activity level of a particular cost driver (remain constant in the relevant range)
In the long run all cost are what?
Variable