Burt spent $2.00 on a packet of basil seeds and $8.00 on potting soil. The packet of seeds yielded 20 basil plants. He sells each basil plant for $5.00 at the local farmer's market. What is the net profit from his basil plants? Give me reasons, before answering the question

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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He spent $2.00 on seeds and $8.00 on soil for a total of 2 + 8 = $10.00. He sells each of the 20 basil plants for $5.00 so he makes 20 * 5 = $100.00. He made $100.00 from selling basil plants and he spent $10.00 to buy and grow the seeds. His net profit is 100 - 10 = $90.00. So the final answer is 90.