XYZ Company produces a unique valve, and has the capacity to produce $50,000$ valves annually. Currently XYZ produces $40,000$ valves and is thinking about increasing production to $45,000$ valves next year. What is the most likely behavior of total manufacturing costs and unit manufacturing costs given this change?

Select answer from the options below

Total manufacturing costs will increase and unit manufacturing costs will stay the same.

Total manufacturing costs will increase and unit manufacturing costs will decrease.

Total manufacturing costs will stay the same and unit manufacturing costs will stay the same.

Total manufacturing costs will stay the same and unit manufacturing costs will decrease.

none of the above