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.

[Q]: ['b', 'W', 'V', 'R', '3761', 'U', '4553', '1803', 'W', '7775', '1067', 'Y', 'D', '3159']
[A]: 22118


[Q]: ['6217', 'A', '1925', 'o', '1433']
[A]: 9575


[Q]: ['i', '8501', 'X', 'R', 'v', 'n', 't', '4489', 'i', 'i', 'w', '2611', '6395', 'z', '6747', '5397', '1797', '3351']
[A]:
39288