TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 1, 3, ['E', '6187', '5861', '3697', '2749', '1171', '6085', 'c', '2291', '2385', '7335', 'B']

SOLUTION: 12048

PROBLEM: 22, 25, ['875', 'x', '229', 'c', '6921', '2739', '8299', '2043', '9471', 'N', '8051', 'K', 'k', 'l', '7453', '8873', '5807', 'p', 'U', 'G', 'R', 'w', '4367', '3631', 'j', 'G', '7537', 'l', 'D', 'q']

SOLUTION: 7998

PROBLEM: 6, 10, ['4995', '8069', 'w', '8487', '1693', 'c', '4041', '8509', 'Z', 'k', '7599']

SOLUTION:
12550