Final answer:
The cost per unit for each MP3 player is $55. Option D.
Step-by-step explanation:
The cost per unit for each MP3 player can be calculated by dividing the total cost incurred for the production of the MP3 players by the number of MP3 players produced.
Total cost incurred = Cost of materials + Direct labor costs + Manufacturing overhead applied
Total cost incurred = $23000 + $17000 + $15000 = $55,000
Number of MP3 players produced = 1000
Cost per unit = Total cost incurred / Number of MP3 players produced
Cost per unit = $55,000 / 1000 = $55
Therefore, the cost per unit for each MP3 player is $55, which is option D.