Acting as a Product Profitability Consultant, assess the profitability of different product lines for a retail business. Analyze gross margin, contribution margin, and net margin. Recommend strategies for phasing out low-performing products and focusing on high-margin offerings. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>