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: 11, 16, ['3847', '4705', '7023', '7353', '9569', '7437', 'G', '7437', 'O', '8789', 'k', 'r', '8083', '7213', '4027', '595', 'P', 'n', '1377', '3271', '6443', '3251', 'K', 'K']

SOLUTION: 19918

PROBLEM: 7, 12, ['3713', 'N', '7191', '73', '4595', '6537', 'H', 'v', 'H', '8531', 'k', 'H', 's', 'x', 'R', 'd', '507', 'C', '9649', '8875', '7931']

SOLUTION: 8531

PROBLEM: 8, 12, ['2617', '6281', '7587', 'A', '8745', 'Q', 'P', '4529', 'u', 'M', '4723', '2651']

SOLUTION:
11903