Adam bought 3 kilograms of nuts and 2.5 kilograms of dried fruits at a store. One kilogram of nuts costs $12 and one kilogram of dried fruit costs $8. How much did his purchases cost? Let's think first. Chain of thought:

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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For the nuts Adam paid 3 * $12 = $36. And for dried fruits Adam paid 2.5 * $8 = $20. So in total for his purchases Adam paid $36 + $20 = $56.
Therefore, the answer is 56.