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, 9, ['6409', '7805', '2757', 'A', '8949', '449', 'N', 'M', '9511', 'v', '6085', '1101', '4995', 'B', '6039', '295', '5459', '4211', 't', '3415']

SOLUTION: 9511

PROBLEM: 5, 15, ['r', '6933', '8849', '3479', 'H', '4269', '7469', '9359', 'K', '3371', 'A', '5371', 'z', 'K', '6147', 'i', 'Q', '9055', 'b', 'g', 'x', '5357', 'L', '2797', '7683', 'L', '7127', 'M']

SOLUTION: 35986

PROBLEM: 4, 7, ['2747', '5371', '8003', 'p', '4775', '7807', '6771', '9877']

SOLUTION:
19353