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, 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: 2, 25, ['R', 'g', '5585', '1059', '3917', '8711', 'K', 'C', 'o', '4587', '7493', 'P', 'B', '5951', 'd', 'b', 'B', '851', 'S', '4589', 'P', '1471', 'Z', 'x', '9477']

SOLUTION: 53691

PROBLEM: 4, 5, ['9137', 'R', '3925', 'G', 'V', 'a', '3721', 'G', 'p', '3797', 'K', '2621', '6163', 'i', 'm']

SOLUTION:
0