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: ['1001', 'T', 'w', 'f', 'Q', '4035', 'b', 'q', 'x', 'R']

SOLUTION: 5036

PROBLEM: ['6957', '4603', '5299', '8451', '9803', 'b']

SOLUTION: 35113

PROBLEM: ['p', '2475']

SOLUTION:
2475