$($a$)$ Determine whether Mountain Air should continue to make the electric motor or outsource it from Mini Motor Company. $($Hint: Analyze the relevant costs of making the $$motors$,$ not the entire air purifier.$)$

Calculate the net advantage $($disadvantage$)$ of outsourcing the electric motors from Mini Motor Company.

Use a negative sign with your answer to indicate a net disadvantage of outsourcing $($if applicable$).$