diff --git a/react-typescript/src/components/Item.tsx b/react-typescript/src/components/Item.tsx
index 79d0c13a..448c1862 100644
--- a/react-typescript/src/components/Item.tsx
+++ b/react-typescript/src/components/Item.tsx
@@ -1,12 +1,12 @@
 import useItem from "../hooks/useItem";
-import Item from "../types"
+import { TItem } from "../types"
 
 function Items() {
   const { items, updateItem } = useItem();
   return (
     <div className="Item">
       <ul>
-        {items.map((item: Item) => {
+        {items.map((item: TItem) => {
           return (
           <li key={item.name}>
             Name: {item.name} Quality: {item.quality} SellIn: {item.sellIn} <button onClick={() => updateItem(item)}></button> 
diff --git a/react-typescript/src/hooks/useItem.ts b/react-typescript/src/hooks/useItem.ts
index 3e4b549f..fe76dbe1 100644
--- a/react-typescript/src/hooks/useItem.ts
+++ b/react-typescript/src/hooks/useItem.ts
@@ -1,6 +1,6 @@
 import { useStore } from "../model";
 import EEvents from "../model/EEvents";
-import Item from "../types"
+import { TItem } from "../types"
 
 function useItem() {
     const { state, dispatch } = useStore();
@@ -8,9 +8,9 @@ function useItem() {
     return {
         items: state,
         
-        updateItem: (item: Item):void => {
+        updateItem: (item: TItem):void => {
             dispatch({
-                type: EEvents.SOLD_ITEM,
+                type: EEvents.NEXT_DAY,
                 payload: {
                     name: item.name
                 }
diff --git a/react-typescript/src/model/EEvents.ts b/react-typescript/src/model/EEvents.ts
index 35c396a7..65bf67ef 100644
--- a/react-typescript/src/model/EEvents.ts
+++ b/react-typescript/src/model/EEvents.ts
@@ -1,5 +1,5 @@
 const enum EEvents {
-    SOLD_ITEM = 'SOLD_ITEM',
+    NEXT_DAY = 'NEXT_DAY',
 }
 
 export default EEvents;
\ No newline at end of file
diff --git a/react-typescript/src/model/initialState.ts b/react-typescript/src/model/initialState.ts
index ef455151..6d45883e 100644
--- a/react-typescript/src/model/initialState.ts
+++ b/react-typescript/src/model/initialState.ts
@@ -1,4 +1,4 @@
- const GildedRose = {
+const initialState = {
     items: [
         {
             name: '+5 Dexterity Vest',
@@ -9,7 +9,7 @@
         {
             name: 'Aged Brie',
             sellIn: 2,
-            quality: 0,
+            quality: 5,
             isConjured: false
         },
         {
@@ -36,7 +36,7 @@
             quality: 6,
             isConjured: true
         },
-    ]
+    ],
 }
 
-export default GildedRose;
\ No newline at end of file
+export default initialState;
\ No newline at end of file
diff --git a/react-typescript/src/model/reducer/calculateQuality.ts b/react-typescript/src/model/reducer/calculateQuality.ts
index 4ecdd754..27d77e67 100644
--- a/react-typescript/src/model/reducer/calculateQuality.ts
+++ b/react-typescript/src/model/reducer/calculateQuality.ts
@@ -1,6 +1,6 @@
-import Item from "../../types"
+import { TItem } from "../../types"
 
-function calculateQuality(state: Item): number {
+function calculateQuality(state: TItem): number {
     const sellInAmount = state.sellIn;
     
     let calculatedQuality = state.quality;
diff --git a/react-typescript/src/model/reducer/index.ts b/react-typescript/src/model/reducer/index.ts
index d9dfd04b..84b75cea 100644
--- a/react-typescript/src/model/reducer/index.ts
+++ b/react-typescript/src/model/reducer/index.ts
@@ -1,26 +1,26 @@
-import Item from '../../types';
+import { TItem } from '../../types';
 import EEvents from '../EEvents';
 import calculateQuality from '././calculateQuality';
 import calculateSellIn from '././calculateSellIn';
 
-function updateQuality(item: Item) {
+function updateQuality(item: TItem): TItem {
   const calculatedQuality = calculateQuality(item);
   return { ...item, quality: calculatedQuality };
 }
 
-function updateSellIn(item: Item) {
+function updateSellIn(item: TItem): TItem {
     const calculatedSellIn = calculateSellIn(item);
     return { ...item, sellIn: calculatedSellIn };
 }
 
-function reducer(state: Item[], action: any): any {
-    if(action.type === EEvents.SOLD_ITEM) {
-        let targetItem = state.find((item) => (item.name.includes(action.payload.name)));
-        if (targetItem !== undefined) {
-            const calculatedItems = [...state];
-
-
-        }
+function reducer(state: TItem[], action: any): TItem[] {
+    if(action.type === EEvents.NEXT_DAY) {
+        return state.map(item => {
+            if(item.name.includes(action.payload.name)) {
+                return updateQuality(updateSellIn(item));
+            }
+            return item;
+        });
     }
     return state;
 }
diff --git a/react-typescript/src/types/index.ts b/react-typescript/src/types/index.ts
index e9b9ce43..11261b68 100644
--- a/react-typescript/src/types/index.ts
+++ b/react-typescript/src/types/index.ts
@@ -5,4 +5,11 @@ type TItem = {
     isConjured: boolean
 }
 
-export default TItem;
\ No newline at end of file
+type TGildedRose = {
+    items: TItem[]
+}
+
+export type {
+    TItem,
+    TGildedRose
+}
\ No newline at end of file