text: import { createSelector } from "reselect";
  const shopItemsSelector = (state) => state.shop.items;
  const taxPercentSelector = (state) => state.shop.taxPercent;
  
  const subtotalSelector = createSelector(shopItemsSelector, (items) =>
      items.reduce((acc, item) => acc + item.value, 0)
  );
  const taxSelector = createSelector(
      subtotalSelector,
      taxPercentSelector,
      (subtotal, taxPercent) => subtotal * (taxPercent / 100)
  );
  export const totalSelector = createSelector(
      subtotalSelector,
      taxSelector,
      (subtotal, tax) => ({
          total: subtotal + tax,
      })
  );
  let exampleState = {
      shop: {
          taxPercent: 8,
          items: [
              { name: "apple", value: 1.2 },
              { name: "orange", value: 0.95 },
          ],
      },
  };
  console.log(subtotalSelector(exampleState));
  console.log(taxSelector(exampleState));
  console.log(totalSelector(exampleState));
  