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]: ['3051', 'Z', 'q', 'u', 'x', '2747', 'e', 'B', '4225', 'Q', 'R', '4629', 'F']
[EX A]: 14652

[EX Q]: ['6321', 'M', 'd', '3673']
[EX A]: 9994

[EX Q]: ['X', 'u', 'B', '269', '9089', 'M', '5175', 'K']
[EX A]:
14533