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]: ['5215', 'c', '839', 'V']
[EX A]: 6054

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

[EX Q]: ['7393', 'F', 'q', 'Z', 'H', 'V']
[EX A]:
7393