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: ['6051', '5303', '1509', '2797', 'Z', '4777', '721', '8563', 'K', '63', '9115', 'd', '7305', '9743', '7409']

Answer: 63356


Question: ['M', '2821', '803']

Answer:
3624