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

Answer: 41173


Question: ['8739', 'K']

Answer: 8739


Question: ['N', 'B', '1289', 'J', 'a', '1491', 'k', '265', '2607', 'V', '2655', 'w', 'T', '7341', 'A', 'F', '551', '1741', '2239', 'd']

Answer:
20179