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]: ['251', '2155', '5029', 'k', 'j', 'I']
[EX A]: 7435

[EX Q]: ['v', '4119', 'I', '475', 'd', 'L', '909', 'F', 'V', '775', 'k', 'A', '9411', '8383', 'W', '1521', 'z', 'j', '7057', 'I']
[EX A]: 32650

[EX Q]: ['8687', 'U', '1083', 'g', 'q', '6291', '7243', 'T', '7929', 'Y', '9603', 'r', '8051', '8629', 'E', '9895', '8713', '8823', 'x']
[EX A]:
84947