Bernie loves eating chocolate. He buys two chocolates every week at the local store. One chocolate costs him $3. In a different store, there is a long-term promotion, during which each chocolate costs only $2. How much would Bernie save in three weeks, if he would buy his chocolates in this store instead of his local one? 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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During three weeks, Bernie buys 3 * 2 = 6 chocolates. In the local store, he pays for them 6 * 3 = $18. If Bernie would buy the same chocolates in the different store, he would pay 6 * 2 = $12. So Bernie would be able to save 18 - 12 = $6. So the final answer is 6.