3. Conceptual Connection: By what dollar amount would the per-unit relevant fixed cost have to decrease before Arches would be indifferent (i.e., incur the same cost) between "making" versus "purchasing" the component? Arches Manufacturing had always made its components in-house. However, Canyonlands Component Works had recently offered to supply one component, DA, at a pric of $50 each. Arches uses 11,500 units of component DA each year. The cost per unit of this component is as follows: Direct materials Direct labor $25.00 6.25 Variable overhead 15.75 7.00 Fixed overhead Total $54.00 Assume that 80% of Arches Manufacturing's fixed overhead for component DA would be eliminated if that component were no longer produced. Required: 1. Conceptual Connection: If Arches decides to purchase the component from Canyonlands, by how much will operating income increase or decrease (as compared to making the component in-house)? $ Which alternative is better? 2. Conceptual Connection: Briefly explain how increasing or decreasing the 80% figure affects Arches's final decision to make or purchase the component. As the percentage of avoidable fixed cost increases (above 80%), total relevant costs of making the component increase, causing the "purchase" decision to be financially appealing (compared to the "make" option) than it was when the percentage was 80%. In other words, as the percentage increases, difference between the "purchase" and "make" options increases resulting in the "purchase" decision being even attractive. Alternatively, as the appealing financially as the costly and percentage of avoidable fixed costs decreases, the "make" option eventually is "purchase" option. Finally, as the percentage of avoidable fixed cost decreases low enough and the total relevant costs of making the component decrease, the option becomes the more financially appealing option