Answer:
The total cost of goods sold = $70,000
Explanation:
Given:
Initial inventory at the start of the year for Jackson Co. = $20,000
Total cost of purchases made during the year = $80,000
Inventory remaining at the end of the year = $30,000
Solution:
Total inventory for Jackson Co. during the year = 
Inventory remaining at the end of the year = $30,000
The cost of the goods sold can be calculated by subtracting the remaining inventory from the total inventory.
Thus, cost of goods sold can be given as :
⇒ 
⇒ 
The total cost of goods sold = $70,000