Answer:
If Concord Corporation purchase from outside it total cost will increase by $4500.
Step-by-step explanation:
Cost of producing the units using current production:
Direct Material Cost $21000
Direct Labour Cost $5500
Variable Overhead Cost $19000
Total Cost of Production $45500
So, Purchase cost minus production cost
Gives $50000 - $45500 increase in cost purchase over production by $4500
Note:
Fixed cost is irrelevant for Concord Corporation either purchase or produce it will remain same.