Question $1$: Cost Behavior and Process Mapping Given Alamac Building Supply's focus on lean manufacturing to achieve high levels of customer service with minimal inventory investment, analyze the cost behavior $($fixed$,$ variable, or mixed$)$ of the following expenses. Additionally, map out a basic supply chain process for a key product line.

$$ Utilities: $$15,000$ annually

$$ Indirect labor: $$120,000$ annually

$$ Machinery maintenance: $$30,000$ annually