Answer: 100 units
Step-by-step explanation:
Assume the volume of output where the two locations have the same total cost is x.
Volume is;
150,000 + 20,000x = 350,000 + 18,000x
20,000x - 18,000x = 350,000 - 150,000
2,000x = 200,000
x = 200,000 / 2,000
x = 100 units