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, 8, ['g', 'D', 'W', 'q', '7817', '9295', '2385', 'V', 'c', '7761']

SOLUTION: 19497

PROBLEM: 11, 12, ['S', 'f', 'V', '7983', 'O', 'k', '699', '2831', 'C', 'B', 'B', '1263', 'b', '509', '8963', '8895']

SOLUTION: 1263

PROBLEM: 1, 2, ['C', 'w']

SOLUTION:
0