Examine the illustration below (a cross section through the Earth as you might observe on the wall of a quarry or a road cut). Give two reasons why the granite must be older than the sedimentary layers. 
Definitions:
Cost Behaviour
The manner in which a cost changes as the related activity level changes, classified into fixed, variable, and mixed costs.
Cost Report
A detailed financial document that outlines the actual costs incurred during a project or for business operations over a defined period, often used for tracking and controlling expenditures.
Relevant Range
The range of activity within which the assumptions about fixed and variable cost behaviors are valid.
Car Washing Labour Cost
The expenses associated with labor that are incurred during the process of washing cars.
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