A restaurant is facing a decision about whether it should bake its own dinner rolls or whether it should continue to purchase the dinner rolls from a local bakery. Which of the following costs would be relevant to its$$ decision?

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Part $1$

A$.$

The purchase price of the dinner rolls purchased from the local bakery

B$.$

The price at which the restaurant sells the dinner rolls

C$.$

The salary of the restaurant manager

D$.$

The original purchase price of the current machinery