vue/vuex 中购物车的price在vuex中怎么写

vuex中的getters是一个计算属性相当于页面中的computed  并且是和state  mutations actions平级的

 export default {

      state: {

            list: []

            },

  getters: {
        price(state) {

            let selectlist = state.list.filter(item => item.ischecked)
            if (selectlist.length) {
                return selectlist.map(item => item.buynum * item.goodsprice).reduce((a, b) => a + b)
            } else {
                return 0
            }
        }
    },


}

怎么取getters的值

<script>
import {mapGetters} from "vuex";
export default {
 computed: {
    ...mapGetters({ price: "myshoppingcar/price" }),
}
</script>