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: 3, 6, ['x', '7739', '1923', '5829', '2215', 'M', '1901', 'A', '1585', 'W', '2433', '8947', '2217', '7879', 'i', '8543', '7457']

SOLUTION: 9967

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: 3, 5, ['c', 'w', '3627', '6739', 'y']

SOLUTION:
10366