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: 3, 13, ['7259', '131', '4039', 'b', '9015', '9573', '8473', 'O', 's', '6851', 'N', 'E', '715', 'k', 'j', 'r', '9679', '9519', '5335', '383', 'A', 'd']

SOLUTION: 38666

PROBLEM: 5, 8, ['5745', '5919', '2351', 'M', '3273', '6855', '2999', 's', 'F', 'o', 'W', '8607']

SOLUTION: 13127

PROBLEM: 11, 15, ['M', '149', 'x', 'e', 'J', '5391', 'S', 'N', 'k', 'a', 'y', '1445', '1785', '8395', '9475']

SOLUTION:
21100