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.

['4089', '2385', 'E', 'K', '259', '295', '6649', '8645', 'n', '2577', '2683', '9041', 'Q', 'm', '4237']
40860

['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']
15717

['k', 'g', '6847', '2151', 'T', 'o', 'n', 'U', '1029', '4809', 'Y', 'S', 'P', '773', 'b', '7225', 'E']

22834