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: 11, 15, ['W', '8193', '2581', 'f', 'j', '5727', 'A', '6177', 'u', '4201', 'T', 'w', 'C', 'u', '7973', 'd', 'c']

SOLUTION: 7973

PROBLEM: 2, 6, ['2495', '83', '1257', '9157', 'z', 'Y', '8689', '385', '747', '1175', 'j', 'U', 'k']

SOLUTION: 10497

PROBLEM: 3, 4, ['I', '8765', 'a', '719', '2555', 'w', '3437', '6159', 'e', '5239']

SOLUTION:
719