Answer:
1b) 7.5
2a) 150℅
2b) $70,000
Step-by-step explanation:
1-a) Contribution income format for last year will be:
 Magic Realm Inc. 
Contribution Income Statement
 Total Per Unit
Sales: $300,000 $20
Variable:. 90,000 6
Contribution 
margin: 210,000 $14
Fixed
expense:. 182,000
Net operating
income:. $28,000
1b) Degree of operating leverage will be:
Degree of operating leverage 

Therefore, we now have:
 = 7.5
 = 7.5
2a) The expected percentage increase= 
Since the degree of operating leverage is 7.5, net operating income should increase by 7.5 times
= 7.5 × 20% = 150℅
2b) Total dollar amount of net operating income for next year would be:
Given:
Last year's net operating income = $28,000
Therefore, the expected increase in net operating income next year = 150% × $28,000 = $42,000
The total expected net operating income would be : $28,000 + $42,000 = $70,000