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.
--------
Question: ['2485', 'Q', 'G', '5533', 'Y', '21', 'D', 'S']

Answer: 8039


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

Answer: 32775


Question: ['g', '8777', '3067', '6569', 'e', '4923', 's', '7349']

Answer:
30685