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: 5, 6, ['x', 't', '9767', '4787', 'T', 'e', 'Y', '8919']

SOLUTION: 0

PROBLEM: 8, 13, ['6413', 'n', 'z', 'T', 'R', 'Y', 'D', 'W', 'L', '521', '3411', 'B', 'O', '6757']

SOLUTION: 3932

PROBLEM: 1, 10, ['2995', 'i', 'd', 'U', '6363', 'c', 'K', 'N', '9981', 'l', '7043', 's', 'v', 'O', 'Z', 'I', '9147', 'e', 'e', 'o', 'b', '7211', 'T', '2479', '813']

SOLUTION:
19339