Final answer:
By accepting the special order, Coronado Company would see an increase in net income by $8,400 since the incremental revenue exceeds the incremental costs associated with the order.
Step-by-step explanation:
To calculate the effect on net income if Coronado Company accepts the special order, we must consider the incremental costs and revenues from the order.
The company's variable cost is $18 per unit, and there will be an additional special shipping cost of $2 per unit, making the total variable cost $20 per unit. The order is for 4200 units at $22 each, leading to total revenue of $92,400.
Subtracting the total variable cost ($20/unit x 4200 units = $84,000) from the total revenue gives us the effect on net income: $92,400 - $84,000 = $8,400 increase.