Conceptual Connection: For each situation, identify the possible root cause$($s$)$ of the activity cost $($such as plant layout, process design, and product design$).$

a$.$A manual insertion process takes $30$ minutes and $8$ pounds of material to produce a product. Automating the insertion process requires $15$ minutes of machine time and $7\mathrm{.}5$ pounds of material. The cost per labor hour is $$12,$ the cost per machine hour is $$8,$ and the cost per pound of materials is $$10.$

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