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: ['E', 'X', 'C', 'v', '2803', 'g', 'b', '763']

SOLUTION: 3566

PROBLEM: ['8755', 'A', '2893', '6703']

SOLUTION: 18351

PROBLEM: ['2653', '5607', 'V', 'd', 'v', 'R', 'W', '3787']

SOLUTION:
12047