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: ['q', 'U', 'I', '5245', 'g', 'Y', 's', 'V', 'b', 'V', 'D', '1193', 'p']

SOLUTION: 6438

PROBLEM: ['T', 'u', '7877']

SOLUTION:
7877