Final answer:
The cost difference between Machine B and Machine A is $15,000.
Step-by-step explanation:
The cost difference between Machine B and Machine A can be calculated by subtracting the cost of Machine A from the cost of Machine B.
Machine A costs $50,000 and Machine B costs $65,000. To find the cost difference, we subtract $50,000 from $65,000: $65,000 - $50,000 = $<<65000-50000=15000>>15,000.
Therefore, the cost difference between Machine B and Machine A is $15,000.