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: ['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']

SOLUTION: 17432

PROBLEM: ['6217', 'A', '1925', 'o', '1433']

SOLUTION: 9575

PROBLEM: ['97', 'x', '1045', 'R', 'M', 'V', 'k', 'm', '4577']

SOLUTION:
5719