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]: ['U', 'd', '893', 'h', '9679', '315', 'H', '339', '2381', '847', '7951', 'e', '9269', '9081', 'o', '6439', 'N', '4531']
[EX A]: 51725

[EX Q]: ['q', 'N', 'y', '7859', 'u', '2861', '4151', 'Q', 'x']
[EX A]: 14871

[EX Q]: ['A', 'O', '8585', 'Z', '4289', 'p', 'V', '8699', 'l', 'b', 'K', 'C', '7257', '7701', 'Z']
[EX A]:
36531