6. The company does not have any finished goods at the beginning of March. The information related to the production and sales of the finished goods in March are as follows: Finished goods which are returned from production: Amount (kg) Unit Cost (TL) 10 March 40 2 15 March 30 3 26 March 20 4 31 March 10 5 Finished goods which are sold: Amount (kg) 10 March 10 15 March 15 18 March 20 a) Calculate the unit cost using the weighted average method. (10 points) b) Calculate the cost of goods sold using the weighted average method. (10 points) Answer (Please show your calculations only)