Solution and explanantion:
Answer A
The Relevant cost of special order
Direct material 6
Direct Labor 4
Overhead (9*2/3) 6
Shipping Cost 2
Total cost 18
Add: Profit Increase in operating Income 3
Therefore, the Price to be charged 21
Answer B
The relevant total cost (18*30000) 540000
The loss of contribution magin (28-18)*30000 300000
The desired Increase in operating Income 60000
The total price 900000
The No.of Units 30000
Therefore, the Price to be charged per unit 30