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: 4, 12, ['k', '7775', '1099', '1507', '7609', 'X', 'O', '521', 'u', 'V', 't', '1935', '8171', '2063', 'h', '2961', 'z', '4955', '1359', 'm', '2137']

SOLUTION: 11572

PROBLEM: 4, 5, ['t', '9215', 'K', 'Q', 'w']

SOLUTION: 0

PROBLEM: 2, 4, ['C', '5693', '1675', '8781', '3839', 's', 'o', 'G', '2643', '4669', 'c', '6281', '8299', '4419', 'n', '6191', 'e', 'a', '1909', 'P', '5275', 'O', '8339', '8465']

SOLUTION:
16149