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, 9, ['8047', 'Q', 'A', '2811', '8953', 'P', '4515', 'f', 'K', 'u', 'g', 'R', 'p', '667', '8703', '2903', '6299', '417', '3317', 'O', 'z', '3507', '8969', '6193', '2549']

SOLUTION: 4515

PROBLEM: 2, 6, ['S', 'y', '2729', '9935', 'T', 'H', '3063', '9587']

SOLUTION: 12664

PROBLEM: 3, 10, ['R', 'w', 't', 'P', 'M', '1671', 'I', '4995', '7633', 'K']

SOLUTION:
14299

