Answer:
The answer is "$4,000 and $2,500"
Step-by-step explanation:
Formula: 
 
 

 
 The scenario was revised by installing new audio connection equipment:
The volume of revised sales

Fixed cost updated 

Cost of the updated component 

Unchanged purchase price/unit 


Audio cable sales are actually profiting = 4,000
Proposal for audio cable sales profit = 2,500