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: ['6907', '9123', 'L', '8871', 'q', 'C', 'U', '7403', 'F', '3827', '3951', '8879', '2865', 'x', '6175', 'T', '1147']

SOLUTION: 59148

PROBLEM: ['8207', '4791', '3925', 'b', 'Z', '8471', '9215', '3117', 'p', '9095', 'h', 'k', 'E', 'h', '6047']

SOLUTION: 52868

PROBLEM: ['4103', '2809', '9969', 'F', 'v', '8295', '2367', 'F', '4487', '4417', 'z']

SOLUTION:
36447