Give the step-by-step reasoning process and then the final answer. Monroe has a collection of ants and a collection of spiders. He has 8 spiders and 12 ants. He is wondering what the number of legs of the entire collection is.

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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The ants have 72 legs because 12 times 6 equals 72. The spiders have 64 legs because 8 times 8 equals 64. There are a total of 136 legs because 72 plus 64 equals 136.
The final answer: 136.