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: ['8665', '6083', '9819', 'H', 'p', 'S', 'R', '4311', 'R', '7193']

SOLUTION: 36071

PROBLEM: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

SOLUTION: 19833

PROBLEM: ['7649', 'R', 'v', '7285', 'O', 'm', 'N', 'j', '2925', '1963', 't', 'E', 'L', 'z', 'e', '7691', '1483', 'Q', 'b', 'm']

SOLUTION:
28996