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]: ['4529', '7465', 'S', 'Z', 'v', 'w', '5791', '3363', '2643']
[EX A]: 23791

[EX Q]: ['8665', '6083', '9819', 'H', 'p', 'S', 'R', '4311', 'R', '7193']
[EX A]: 36071

[EX Q]: ['8815', 'v', '3927', '7997', '3341', 'Z']
[EX A]:
24080