What i wrong with my code

Question

Specifications

1. Use a new cell in your notebook
2. Declare a variable named DATA as a dictionary object. Assign the set of key/value pairs shown below.
3. Create a function named iter_dict_funky_sum() that takes one dictionary argument.
   1. Declare a running total integer variable.
   2. Extract the key/value pairs from DATA simultaneously in a loop. Do this with just one for loop and no additional forms of looping.
   3. Assign and append the product of the value minus the key to the running total variable.
   4. Return the funky total.

Dictionary Data

DATA = {
    2: 7493945,
    76: 4654320,
    3: 4091979,
    90: 1824881,
    82: 714422,
    45: 1137701,
    10: 374362,
    0: 326226,
    -15: 417203,
    -56: 333525,
    67: 323451,
    99: 321696,
    21: 336753,
    -100: 361237,
    55: 1209714,
    5150: 1771800,
    42: 4714011,
    888: 14817667,
    3500: 13760234,
    712: 10903322,
    7: 10443792,
    842: 11716264,
    18584: 10559923,
    666: 9275602,
    70: 11901200,
    153: 12074784,
    8: 4337229
}

Expected Output

>>> iter_dict_funky_sum(DATA)
140166242

here is the code I wrote

DATA = {
    2: 7493945,
    76: 4654320,
    3: 4091979,
    90: 1824881,
    82: 714422,
    45: 1137701,
    10: 374362,
    0: 326226,
    -15: 417203,
    -56: 333525,
    67: 323451,
    99: 321696,
    21: 336753,
    -100: 361237,
    55: 1209714,
    5150: 1771800,
    42: 4714011,
    888: 14817667,
    3500: 13760234,
    712: 10903322,
    7: 10443792,
    842: 11716264,
    18584: 10559923,
    666: 9275602,
    70: 11901200,
    153: 12074784,
    8: 4337229
}
def iter_dict_funky_sum(dictionary):
    running = 0
    for key,value in dictionary.iteritems():
    running+=(value-key)
      return running 
print(iter_dict_funky_sum(DATA))