Answer:
Increase in the net income=$ 89,160 
Step-by-step explanation:
The amount of the financial advantage or disadvantage would be determined as follows: 
Unit variable cost of order = 16.30 + 5.60+ 2.80+5.20 = 29.9
 $ 
Sales from special order) ($45.50× 8,600) 391300 
Variable cost of special order ($29.9× 8,600)  257,140 
Contribution from special order 134,160 
Cost of special machine (45,000) 
Increase in contribution 89,160 
Increase in the net income=$ 89,160 
Note the fixed manufacturing overhead is irrelevant, they are cost that would be incurred whether or not the order is accepted