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

SOLUTION: 3932

PROBLEM: 14, 15, ['N', 'u', '4633', '5481', '2469', 'y', '2253', '4629', '8399', 'q', 'H', '8507', '1789', 'A', '5085', 'G', '9679', 'G', 'u', '9381']

SOLUTION: 5085

PROBLEM: 2, 3, ['4137', 'r', 'M', 'g', '8579', '559', '5853', 'T', 'u', 'A', 'E', '5511', 'W', 'X', '9521']

SOLUTION:
0