Answer:
The correct answer is:
$300 (B)
Step-by-step explanation:
The value added on a product is the amount of profit made on the product, after the cost incurred have been deducted. In this case, the tanner bought the leather for $400, and then sells it for $700, therefore, the value added is calculated as:
value added = selling price - cost price = 700 - 400 = $300.