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: 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: 10, 11, ['J', '5319', '1625', 'z', '275', 'B', '6901', 'b', 'X', '8669', '2307', '3117', 'K']

SOLUTION: 10976

PROBLEM: 18, 19, ['9907', '6405', 'O', 'h', 'Y', 'J', '8065', '4155', 'E', 'G', 'w', '6405', 'b', 'Q', 'q', '6001', '9623', '937', 'm', 'c', '8643', 'w', 'Y', 'g', '4903', 'U', 'g', 'b']

SOLUTION:
937