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: 1, 15, ['k', 'z', 'D', '4827', '8921', 'o', 'e', 'U', 'f', '7419', 't', 'Z', 'c', '4089', '1117', '2309', '9095']

SOLUTION: 26373

PROBLEM: 2, 2, ['R', '979', 'H', 'W', 'y']

SOLUTION: 979

PROBLEM: 1, 2, ['H', 'd', 'G']

SOLUTION:
0