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: 7, 19, ['6719', 'c', 'S', '3259', '1287', 'u', '9251', '2183', '4821', '9449', 'I', 'P', 'i', '7597', '8141', 'G', 'j', '8587', '7245', 'G', 'O', 'o', '9479']

SOLUTION: 57274

PROBLEM: 11, 20, ['8031', 'v', 'p', '4015', 'v', '3299', '4143', '445', 'I', 'L', 'm', 'u', '7963', '8085', 'c', 'k', 'I', 'A', '8433', '1897', 'g', 'x', '5935', '5195', 'W', 'j', 'A']

SOLUTION: 26378

PROBLEM: 4, 8, ['4327', 'L', '2859', 'w', '7729', 'r', 'O', '6249', 'D', 'p', '6827', 'U', '9005', '4453', 'E', 'T', '4041', 'S', '8257', 'K', 'K', '3375', '8113', '3689']

SOLUTION:
13978