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: ['7755', '8383', 'y', 'k', '4869', '2809']

SOLUTION: 23816

PROBLEM: ['7763', '6003', 'V']

SOLUTION: 13766

PROBLEM: ['q', 'y']

SOLUTION:
0