<|system|>Given a definition of a task and a sample input, break the definition into small parts.
Each of those parts will have some instruction. Explain their meaning by showing an example that meets the criteria in the instruction. Use the following format:
Part  # : a key part of the definition.
Usage: Sample response that meets the criteria from the key part. Explain why you think it meets the criteria.<|end|>
<|user|>Definition: In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.
Input: ['g', '6245', 'u', 'U']
Output:<|end|>
<|assistant|>Part 1: Given an input list A.
Usage: Input list A = ['g', '6245', 'u', 'U']. The list contains various elements, including both characters and numbers. 

Part 2: Find all the elements of the list that are numbers.
Usage: In the list A = ['g', '6245', 'u', 'U'], the element '6245' is a number (and all the other elements are characters). It meets the criteria because it represents a numeric value.

Part 3: Calculate the sum of the number elements.
Usage: Considering the list A = ['g', '6245', 'u', 'U'], the sum of number elements is 6245 (since there is only one number element in the list). The numeric elements fulfill the requirement of producing a total sum value.<|endoftext|>