To determine how many products the business needs to sell to achieve the maximum profit per product sold, I would need to analyze the graph you mentioned. However, since I cannot view graphs or images, I can't provide a specific answer without more details.
To find the optimal number of products sold for maximum profit per product, you typically look for the point on the graph that shows the highest value of profit per product in relation to the number of products sold. This is usually where the slope of the profit curve is at its peak.
If you could describe the graph's key features, such as the shape of the curve, any specified values, or intervals at which maximum profit occurs, I would be happy to help you interpret that information to estimate the number of products the business needs to sell.