code: def sp_sum_values(self):
          
          if self.values is None:
              ret = IdValues()
          else:
              ret = IdValues({k: sum(int(x) for x in v.values()) for k, v in
                              self.values.items()})
          return ret
docs: return sp level values
  
          input:
          "values": {
              "spa": {
                  "19": "385",
                  "18": "0",
                  "20": "0",
                  "17": "0",
                  "16": "0"
              },
              "spb": {
                  "19": "101",
                  "18": "101",
                  "20": "101",
                  "17": "101",
                  "16": "101"
              }
          },
  
          return:
          "values": {
              "spa": 385,
              "spb": 505
          },