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.
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Question: ['9211', '1889', '7371', '9649', 'b', 'y', 'q', 'a', 'i', '1137', '3291', '8625']

Answer: 41173


Question: ['j', 'f', '3831', 'B', 'D']

Answer: 3831


Question: ['b', 'q', '8445', '8307', '1743']

Answer:
18495