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.

[EX Q]: ['6515', '5525', 'o', 'Q', '9049', 'f', 'p', 'X', '2057', 'h', '7585', '3617', '7817']
[EX A]: 42165

[EX Q]: ['T', '8333', 'C', 'Z', 'n', '1419', 'd', '3205', 'D', '1187', 'd']
[EX A]: 14144

[EX Q]: ['G', '4575', '1411', '8579', '5663']
[EX A]:
20228