The correct answer is A. Rs. 78,000.
The formula for calculating purchases is:
Purchases = Cost of goods sold + Opening stock – Closing stock
In this case, we have the following information:
- Cost of goods sold = Rs. 80,000
- Opening stock = Rs. 10,000
- Closing stock = Rs. 8,000
Substituting these values into the formula, we get:
Purchases = Rs. 80,000 + Rs. 10,000 – Rs. 8,000 = Rs. 78,000
Option B is incorrect because it is the value of the closing stock. Option C is incorrect because it is the value of the opening stock plus the cost of goods sold. Option D is incorrect because it is the value of the cost of goods sold plus the closing stock.