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

SOLUTION: 8039

PROBLEM: ['1147', 'f']

SOLUTION: 1147

PROBLEM: ['3785', 'V', 'y', 'D', 'q']

SOLUTION:
3785