Concept:An invoice is a commercial document sent by the seller to the buyer to record the details of a sales transaction.
Explanation:It shows the quantity of goods sold.
It describes each item clearly.
It states the unit price and any discounts.
It gives the total value of the purchase to be paid.
This makes it a complete record of the sale, not merely a contract or a receipt.
Thus, the best option is the one that lists quantity, description, prices, and total value.
Answer:B. Document specifying quantity, description, prices and total value of purchase.