Answer:
Part 1:If the campaign is implemented in the Medical Market, the increase in profit is $ 9400.
Part 2: If the campaign is implemented in the Dental Market, the increase in profit is $ 11800.
Part 3: As the increase in profit is more in the dental market than in the medical market, the campaign should be focused in the Dental Market.
Part 4: The total traceable fixed expenses are ($12000+$21000=$33000) while the remaining $15000 are non traceable common expenses which cannot be related to the either markets.
Step-by-step explanation:
As the complete question is not given, the question as obtained from the search is included with the question as the image. From the data
As from the given data
For Part 1
Increase in Sales in Medical=I_s=$ 40,000
Contribution Margin=cm=36%
Cost of Campaign=C=$5000
So the Incremental Contribution Margin(I_cm) is given as

Now the increase/decrease in profit is given as

So If the campaign is implemented in the Medical Market, the increase in profit is $ 9400.
For Part 2
Increase in Sales in Dental=I_s=$ 35,000
Contribution Margin=cm=48%
Cost of Campaign=C=$5000
So the Incremental Contribution Margin(I_cm) is given as

Now the increase/decrease in profit is given as

So If the campaign is implemented in the Dental Market, the increase in profit is $ 11800.
For Part 3
As the increase in profit is more in the dental market than in the medical market, the campaign should be focused in the Dental Market.
For Part 4
For this exercise the total traceable fixed expenses are divided into 3 components as
Traceable expenses for the Medical Market: $12000
Traceable expenses for the Dental Market: $21000
Non Traceable Common Expenses: $15000.
So the total traceable fixed expenses are ($12000+$21000=$33000) while the remaining $15000 are non traceable common expenses which cannot be related to the either markets.