diff --git a/finance-tracker/.gitignore b/finance-tracker/.gitignore
new file mode 100644
index 0000000..c2658d7
--- /dev/null
+++ b/finance-tracker/.gitignore
@@ -0,0 +1 @@
+node_modules/
diff --git a/finance-tracker/.prettierrc b/finance-tracker/.prettierrc
new file mode 100644
index 0000000..b0ec5b3
--- /dev/null
+++ b/finance-tracker/.prettierrc
@@ -0,0 +1,7 @@
+{
+  "semi": true,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "printWidth": 80
+}
diff --git a/finance-tracker/app.js b/finance-tracker/app.js
index 7cfcd07..1f959eb 100644
--- a/finance-tracker/app.js
+++ b/finance-tracker/app.js
@@ -1,3 +1,14 @@
-// This is the entrypoint for your application.
-// node app.js
+import { transactions } from './data.js';
+import {
+  addTransaction,
+  getTotalIncome,
+  getTotalExpenses,
+  getBalance,
+  getTransactionsByCategory,
+  getLargestExpense,
+  printAllTransactions,
+  printSummary,
+} from './finance.js';
 
+printAllTransactions(transactions);
+printSummary(transactions);
diff --git a/finance-tracker/data.js b/finance-tracker/data.js
index d7863ff..f68fd10 100644
--- a/finance-tracker/data.js
+++ b/finance-tracker/data.js
@@ -1,2 +1,84 @@
-// 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: 'salary',
+    date: '2025-12-28',
+  },
+  {
+    id: 2,
+    type: 'expense',
+    category: 'rent',
+    amount: 800,
+    description: 'housing',
+    date: '2026-01-01',
+  },
+  {
+    id: 3,
+    type: 'expense',
+    category: 'utility',
+    amount: 250,
+    description: 'bills',
+    date: '2026-01-16',
+  },
+  {
+    id: 4,
+    type: 'expense',
+    category: 'groceries',
+    amount: 180,
+    description: 'food',
+    date: '2026-01-26',
+  },
+  {
+    id: 5,
+    type: 'income',
+    category: 'benefits',
+    amount: 200,
+    description: 'huurtoeslag',
+    date: '2026-01-20',
+  },
+  {
+    id: 6,
+    type: 'expense',
+    category: 'insurance',
+    amount: 210,
+    description: 'bills',
+    date: '2026-01-24',
+  },
+  {
+    id: 7,
+    type: 'income',
+    category: 'salary',
+    amount: 350,
+    description: 'freelance',
+    date: '2026-01-19',
+  },
+  {
+    id: 8,
+    type: 'expense',
+    category: 'transport',
+    amount: 80,
+    description: 'bills',
+    date: '2026-01-30',
+  },
+  {
+    id: 9,
+    type: 'expense',
+    category: 'entertainment',
+    amount: 60,
+    description: 'pc-games',
+    date: '2026-01-01',
+  },
+  {
+    id: 10,
+    type: 'expense',
+    category: '',
+    amount: 200,
+    description: '',
+    date: '2026-01-20',
+  },
+];
+
+export default transactions;
diff --git a/finance-tracker/finance.js b/finance-tracker/finance.js
index ac2118f..811d564 100644
--- a/finance-tracker/finance.js
+++ b/finance-tracker/finance.js
@@ -1,27 +1,85 @@
-function addTransaction(transaction) {
-  // TODO: Implement this function
+import transactions from `./data.js`;
+import chalk from 'chalk';
+
+export function addTransaction(transaction) {
+  transactions.push({ ...transaction });
 }
 
-function getTotalIncome() {
-  // TODO: Implement this function
+export function getTotalIncome(transactions) {
+  let totalIncome = 0;
+  for (const transaction of transactions) {
+    if (transaction.type === `income`) {
+      totalIncome += transaction.amount;
+    }
+  }
+  return totalIncome;
 }
 
-function getTotalExpenses() {
-  // TODO: Implement this function
+export function getTotalExpenses(transactions) {
+  let totalExpenses = 0;
+  for (const transaction of transactions) {
+    if (transaction.type === `expense`) {
+      totalExpenses += transaction.amount;
+    }
+  }
+  return totalExpenses;
 }
 
-function getBalance() {
-  // TODO: Implement this function
+export function getBalance() {
+  return getTotalIncome() - getTotalExpenses();
 }
 
-function getTransactionsByCategory(category) {
-  // TODO: Implement this function
+export function getTransactionsByCategory(transactions, category) {
+  const result = [];
+  for (const transaction of transactions) {
+    if (transaction.category === category) {
+      result.push(transaction);
+    }
+  }
+  return result;
 }
 
-function getLargestExpense() {
-  // TODO: Implement this function
+
+export function getLargestExpense() {
+  let largest = null;
+  for (const transaction of transactions) {
+    if (transaction.type === 'expense' && (!largest || transaction.amount > largest.amount)) {
+      largest = transaction;
+    }
+  }
+  return largest;
 }
 
-function printAllTransactions() {
-  // TODO: Implement this function
+export function printAllTransactions(transactions) {
+  console.log(chalk.bold.cyan('PERSONAL FINANCE TRACKER\n'));
+  console.log(chalk.bold('All Transactions:\n'));
+
+  transactions.forEach((transaction, index) => {
+    const { id, type, category, amount, description } = transaction;
+    const typeLabel = type === 'income' ? '[INCOME]' : '[EXPENSE]';
+    const coloredAmount =
+      type === 'income' ? chalk.green(`€${amount}`) : chalk.red(`€${amount}`);
+    const coloredCategory = chalk.yellow(`(${category})`);
+
+    console.log(`${index + 1}. ${typeLabel} ${description} - ${coloredAmount} ${coloredCategory}`);
+  });
+
+export function printSummary(transactions) {
+  const totalIncome = getTotalIncome(transactions);
+  const totalExpenses = getTotalExpenses(transactions);
+  const balance = getBalance(transactions);
+  const largestExpense = getLargestExpense(transactions);
+  const transactionCount = transactions.length;
+
+  console.log(chalk.bold.cyan('FINANCIAL SUMMARY\n'));
+  console.log(`Total Income: ${chalk.green(`€${totalIncome}`)}`);
+  console.log(`Total Expenses: ${chalk.red(`€${totalExpenses}`)}`);
+  const balanceColor = balance >= 0 ? chalk.cyan : chalk.red;
+  console.log(`Current Balance: ${balanceColor(`€${balance}`)}`);
+
+  if (largestExpense) {
+    console.log(
+      `\nLargest Expense: ${largestExpense.description} (${chalk.red(`€${largestExpense.amount}`)})`);
+  }
+  console.log(`Total Transactions: ${chalk.bold(transactionCount)}\n`);
 }
\ No newline at end of file
diff --git a/finance-tracker/package-lock.json b/finance-tracker/package-lock.json
new file mode 100644
index 0000000..f93f7a6
--- /dev/null
+++ b/finance-tracker/package-lock.json
@@ -0,0 +1,28 @@
+{
+  "name": "hyf-assignment",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "hyf-assignment",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "chalk": "^5.6.2"
+      }
+    },
+    "node_modules/chalk": {
+      "version": "5.6.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-5.6.2.tgz",
+      "integrity": "sha512-7NzBL0rN6fMUW+f7A6Io4h40qQlG+xGmtMxfbnH/K7TAtt8JQWVQK+6g0UXKMeVJoyV5EkkNsErQ8pVD3bLHbA==",
+      "license": "MIT",
+      "engines": {
+        "node": "^12.17.0 || ^14.13 || >=16.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/chalk?sponsor=1"
+      }
+    }
+  }
+}
diff --git a/finance-tracker/package.json b/finance-tracker/package.json
new file mode 100644
index 0000000..c35fb09
--- /dev/null
+++ b/finance-tracker/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "hyf-assignment",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "commonjs",
+  "dependencies": {
+    "chalk": "^5.6.2"
+  }
+}