Fixed cost
cost remains the same over a period of time (rent)
Variable
cost changes in proportion to the change in the
level of activity (material cost)
Semi Variable / Semi Fixed
part of it is fixed, part of it is variable (sales rep
remuneration)
Stepped Fixed
cost is fixed up to a certain point after which it
increases in step fashion (supervisors salaries)
For Fromulas Check Page
pg 43 of manual!