Chapter $1$: Think about a business you are familiar with $($this could be from your own experience or a hypothetical business$).$ Identify at least two examples each of fixed costs, variable costs, and mixed costs within this business. How does understanding these cost classifications help in planning and controlling business operations?

Chapters $2$ & $3$: Briefly explain the job$-$order costing system. In what types of industries or situations is this costing method most effectively used? What challenges might arise when implementing a job$-$order costing system? How would you address issues like overhead allocation, cost overruns, or inaccurate job cost records?