TASK DEFINITION: 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.
PROBLEM: ['I', '7815']

SOLUTION: 7815

PROBLEM: ['2175', '4539', 'L', 'T', 'q', '2407', 'F', 'V', 'b', '9475', '2279', '4469', '6231']

SOLUTION: 31575

PROBLEM: ['m', 'C', 'G', '8801', 'E', 'X', 'h']

SOLUTION:
8801