Answer:
1)
cost of making (14000*22) = 308000
cost of buying (14000*(18+6)) = 336000
Difference cost = 28000
2)
No, Since, there is not other use of fixed cost, therefore, fixed cost will be a part of cost of buying.
3-a)
cost of making (14000*22) = 308000
cost of buying (14000*18) = 252000
3-b)
Yes, Since, there is other use of fixed cost, therefore, fixed cost will not be a part of cost of buying.