const reducer = combineReducers({ height, width, thickness, shape, volume })
const store = createStore(
  reducer,
  initialState,
  devToolsEnhancer()
)

const reducer = combineReducers({ height, width, thickness, shape, volume })
const store = createStore(
  reducer,
  initialState,
  applyMiddleware(thunk),
  devToolsEnhancer()
)