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.

['2923', '3573', '6179', '7673', '6551', 'B', '315', '5169', 'm', '9405', 'm', 'Z']
41788

['W', '4453', '5895', 'Z', 'A', '7663', '2749', 'f', 'H', '6917', '1215', 'M', '1775', '5397', 'l', '8197', '5209', '8229', 'U']
57699

['D', '3035', '7167', '7173', '9103', '1801', '5443', '263', '2567', 'L', 'p', 'S']

36552