Answer:
A) The company must consume more than 666667 solenoids per year to make the in-house option least costly.
B) - quality of the product
- prompt delivery of products
- good communication & relationship with external parties.
Step-by-step explanation:
A) Since if they use a subcontractor, they will share part of the equipment cost, Let the cross over point for manufacturing the solenoid in house and using a contractor be denoted as x.
Now, variable costs of labor and material are $5.00 per unit. This is 5x
Also from the subcontractor, production of the part is estimated at $8.00 per unit. This is 8x.
Thus;
6000000 + 5x = 4000000 + 8x
Rearranging, we have;
6000000 - 4000000 = 8x - 5x
3x = 2000000
x = 2000000/3
x ≈ 666667
Thus, the company must consume more than 666667 solenoids per year to make the in-house option least costly.
B) Apart from cost, other factors the company must consider are quality of the product, prompt delivery of products, good communication & relationship with stakeholders involved.