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.

Example Input: ['E', '9289', 'j', '1847', 'u', 'w', 'z', '4045', '9567', '3133', '2967', 'I', '1927', 'I', 'f', 'T']
Example Output: 32775

Example Input: ['9403', 'u', '4159', 'w', '3467']
Example Output: 17029

Example Input: ['8211', 'g', 'Z', '8245', 'f', 'Y', '2145']
Example Output:
18601