diff --git a/.gitignore b/.gitignore
index 2b76d7c..f2f1ecf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -156,3 +156,5 @@ dist
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
 
+node_modules/
+
diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 0000000..35b9a89
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,7 @@
+{
+    "semi"; true,
+    "singleQuote"; true,
+    "tabWidth"; 2,
+    "trailingComma"; "es5",
+    "printWidth"; 80
+}
\ No newline at end of file
diff --git a/finance-tracker/app.js b/finance-tracker/app.js
index 7cfcd07..993fedc 100644
--- a/finance-tracker/app.js
+++ b/finance-tracker/app.js
@@ -1,3 +1,11 @@
 // This is the entrypoint for your application.
 // node app.js
 
+const chalk = require('chalk');
+const { printAllTransactions, printSummary } = require('./finance');
+
+console.log(chalk.bold('💰 PERSONAL FINANCE TRACKER 💰'));
+
+printAllTransactions();
+printSummary();
+ 
\ No newline at end of file
diff --git a/finance-tracker/data.js b/finance-tracker/data.js
index d7863ff..25a9253 100644
--- a/finance-tracker/data.js
+++ b/finance-tracker/data.js
@@ -1,2 +1,45 @@
 // Place here the transaction data array. Use it in your application as needed.
-const transactions = [];
\ No newline at end of file
+const transactions = [
+    {
+    id: 1,
+    type: 'income',
+    category: 'salary',
+    amount: 3000,
+    description: 'Monthly salary',
+    date: '2025-01-15'
+  },
+  {
+    id: 2,
+    type: 'expense',
+    category: 'housing',
+    amount: 1200,
+    description: 'Rent',
+    date: '2025-01-05'
+  },
+  {
+    id: 3,
+    type: 'expense',
+    category: 'food',
+    amount: 300,
+    description: 'Groceries',
+    date: '2025-01-10'
+  },
+  {
+    id: 4,
+    type: 'income',
+    category: 'side-income',
+    amount: 500,
+    description: 'Freelance work',
+    date: '2025-01-20'
+  },
+  {
+    id: 5,
+    type: 'expense',
+    category: 'bills',
+    amount: 150,
+    description: 'Utilities',
+    date: '2025-01-18'
+  },
+];
+
+module.exports = transactions;
\ No newline at end of file
diff --git a/finance-tracker/finance.js b/finance-tracker/finance.js
index ac2118f..8594c42 100644
--- a/finance-tracker/finance.js
+++ b/finance-tracker/finance.js
@@ -1,27 +1,111 @@
+const chalk = require('chalk');
+const transactions = require('./data');
+
+
 function addTransaction(transaction) {
   // TODO: Implement this function
+  transaction.push({...transaction}); //
 }
 
 function getTotalIncome() {
   // TODO: Implement this function
+  let totalIncome=0;
+  for(const transaction of transactions){
+    if (transaction.type === 'income'){
+      totalIncome += transaction.amount;
+    }
+  }
+  return totalIncome;
 }
 
 function getTotalExpenses() {
   // TODO: Implement this function
+  let totalExpenses=0;
+  for(const transaction of transactions){
+    if (transaction.type === 'expense'){
+      totalExpenses += transaction.amount;
+    }
+  }
+  return totalExpenses;
 }
 
 function getBalance() {
   // TODO: Implement this function
+  return getTotalIncome() - getTotalExpenses();
 }
 
 function getTransactionsByCategory(category) {
   // TODO: Implement this function
+  const result =[];
+  for (const transaction of transactions){
+    if (transaction.category === category){
+      result.push(transaction);
+    }
+  }
+  return result;
 }
 
 function getLargestExpense() {
   // TODO: Implement this function
+  let largest = null;
+  for(const transaction of transactions)
+    if(transaction.type === 'expense'){
+      if(largest=== null || transaction.amount > largest.amount){
+        largest= transaction;
+      }
+    }
+    return largest;
 }
 
 function printAllTransactions() {
   // TODO: Implement this function
-}
\ No newline at end of file
+
+  console.log(chalk.bold('All transactions'));
+
+  for(const transaction of transactions){
+    const amountColor = transaction.type === 'income'
+        ? chalk.green(`€${transaction.amount}`)
+        : chalk.red(`€${transaction.amount}`);
+
+    console.log(
+      `${transaction.id}. [${
+        transaction.type.toUpperCase()
+      }] ${transaction.description} - ${amountColor} (${chalk.yellow(
+        transaction.category
+      )})`
+    );
+  }
+
+}
+
+function printSummary(){
+const totalIncome = getTotalIncome();
+const totalExpenses = getTotalExpenses();
+const balance = getBalance ();
+const numberTransaction = transactions.length;
+const largestExpense = getLargestExpense();
+
+console.log(chalk.bold('\n📊 FINANCIAL SUMMARY 📊'));
+console.log(chalk.bold(`Total Income: €${totalIncome}`));
+console.log(chalk.bold(`Total Expenses: €${totalExpenses}`));
+
+  const balanceColor =
+    balance >= 0 ? chalk.cyan(`€${balance}`) : chalk.red(`€${balance}`);
+
+  console.log(chalk.bold(`Current Balance: ${balanceColor}`));
+  console.log(chalk.bold(`Total Transactions: ${transactions.length}`));
+
+  if (largestExpense) {
+    console.log(
+      chalk.bold(
+        `Largest Expense: ${largestExpense.description} (€${largestExpense.amount})`
+      )
+    );
+  }
+}
+
+module.exports = { printAllTransactions, printSummary };
+//console.log(chalk.bold('💰 PERSONAL FINANCE TRACKER 💰'));
+
+//printAllTransactions();
+//printSummary();
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..52239c6
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,86 @@
+{
+  "name": "c55-core-week-4",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "c55-core-week-4",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "chalk": "^4.1.2"
+      }
+    },
+    "node_modules/ansi-styles": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "license": "MIT",
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/chalk": {
+      "version": "4.1.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-4.1.2.tgz",
+      "integrity": "sha512-oKnbhFyRIXpUuez8iBMmyEa4nbj4IOQyuhc/wy9kY7/WVPcwIO9VA668Pu8RkO7+0G76SLROeyw9CpQ061i4mA==",
+      "license": "MIT",
+      "dependencies": {
+        "ansi-styles": "^4.1.0",
+        "supports-color": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=10"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/chalk?sponsor=1"
+      }
+    },
+    "node_modules/color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "~1.1.4"
+      },
+      "engines": {
+        "node": ">=7.0.0"
+      }
+    },
+    "node_modules/color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "license": "MIT"
+    },
+    "node_modules/has-flag": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-4.0.0.tgz",
+      "integrity": "sha512-EykJT/Q1KjTWctppgIAgfSO0tKVuZUjhgMr17kqTumMl6Afv3EISleU7qZUzoXDFTAHTDC4NOoG/ZxU3EvlMPQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "license": "MIT",
+      "dependencies": {
+        "has-flag": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..71aaae2
--- /dev/null
+++ b/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "c55-core-week-4",
+  "version": "1.0.0",
+  "description": "The week 4 assignment for the HackYourFuture Core program can be found at the following link: https://hub.hackyourfuture.nl/core-program-week-4-assignment",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/thebaraah/c55-core-week-4.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "bugs": {
+    "url": "https://github.com/thebaraah/c55-core-week-4/issues"
+  },
+  "homepage": "https://github.com/thebaraah/c55-core-week-4#readme",
+  "dependencies": {
+    "chalk": "^4.1.2"
+  }
+}