Concept:Unused stock means the stock remaining after sales have been made. It is the same as closing stock.Explanation:From the information given, closing stock is provided directly as #350.This is the value of stock not used or not sold at the end of the period.Opening stock, purchases, sales, and carriage are not needed to find the unused stock because closing stock is already stated.Therefore, the value of the unused stock is #350.Answer:C. #350