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: 6, 20, ['x', 'z', '271', 'M', '1727', '9453', '4017', 'o', '8109', 'X', '5989', '275', 'V', '3019', 'Z', 'K', 'L', '3885', '8699', '6241']

SOLUTION: 49687

PROBLEM: 11, 18, ['7053', '4271', '3175', '3997', '4153', '3255', 'd', '4507', 'q', 'm', 'V', '9999', 'Q', 'v', '8543', '2835', '1545', '3549']

SOLUTION: 26471

PROBLEM: 2, 2, ['g', 't']

SOLUTION:
0