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: ['6585', '5263', '9497', '1117', 'a', 'F', 'w', '6595', '547']

SOLUTION: 29604

PROBLEM: ['E', '9289', 'j', '1847', 'u', 'w', 'z', '4045', '9567', '3133', '2967', 'I', '1927', 'I', 'f', 'T']

SOLUTION: 32775

PROBLEM: ['V', 'g', 'T', 'U', '1645', 'T', '13', '5207', '8263', '4469', 'E', 'f', '6687', '7909', 'r', 'L', 'y']

SOLUTION:
34193