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]: ['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']
[EX A]: 36242

[EX Q]: ['A', '9775', '5867', 'n', '1329', '5973']
[EX A]: 22944

[EX Q]: ['4787', 'J', '8889', 'G', 'i', 'A', 'u', '6943', 'H', '9687', 'y', '7821', 'e', 'G', 'd', '435', '1529', '8189']
[EX A]:
48280