<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  How do you calculate gross profit margin? Context: To calculate gross profit margin, you subtract the cost of goods sold from revenue and then divide by revenue. Answer: [/INST]Gross Profit Margin = (Revenue - Cost of Goods Sold) / Revenue.</s>