input: Write a function to compute the sum of all values in a given dictionary where the keys are strings and the values are integers. The function should return the total sum.
  
  assert compute_dict_sum({"a": 5, "b": 10, "c": 15}) == 30
  assert compute_dict_sum({"x": 2, "y": 4, "z": 6}) == 12
  assert compute_dict_sum({}) == 0
  assert compute_dict_sum({"one": 1, "two": 2, "three": 3, "four": 4}) == 10
output: def compute_dict_sum(d):
      return sum(d.values())