Answer:
The correct answer is option d.
Step-by-step explanation:
The firm here is producing 50,000 units of clothing.
It is incurring a cost of $500,000 in the production process.
The company is to increase production by 5,000 units of clothing.
This requires an additional cost of $100,000.
The cost of increased production will be
= $500,000 + $100,000
= $600,000
So, option d is the correct answer.