diff --git a/src/transactions.ts b/src/transactions.ts
index f1cd836..5d302b6 100644
--- a/src/transactions.ts
+++ b/src/transactions.ts
@@ -21,8 +21,10 @@ const transactions: Transaction[] = [
 // filterIncomeTransactions(transactions); // => [["income", 1000], ["income", 1500], ["income", 700]]
 function filterIncomeTransactions(transactions: Transaction[]): Transaction[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+  const incomeTrans: Transaction[] = transactions.filter((n) =>
+    n.includes("income")
+  );
+  return incomeTrans; // replace empty array with what you see is fit
 }
 
 // `filterExpenseTransactions` function that:
@@ -32,8 +34,10 @@ function filterIncomeTransactions(transactions: Transaction[]): Transaction[] {
 // filterExpenseTransactions(transactions); // => [["expense", 500], ["expense", 300]]
 function filterExpenseTransactions(transactions: Transaction[]): Transaction[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+  const expenseTrans: Transaction[] = transactions.filter((n) =>
+    n.includes("expense")
+  );
+  return expenseTrans; // replace empty array with what you see is fit
 }
 
 // `calculateTotalIncome` function that:
@@ -43,8 +47,10 @@ function filterExpenseTransactions(transactions: Transaction[]): Transaction[] {
 // calculateTotalIncome(transactions); // => 3200  (1000 + 1500 + 700)
 function calculateTotalIncome(transactions: Transaction[]): number {
   // write your code here...
-
-  return -1; // replace -1 with what you see is fit
+  const total = transactions
+    .filter((n) => n.includes("income"))
+    .reduce((t, n) => t + n[1], 0);
+  return total; // replace -1 with what you see is fit
 }
 
 // `calculateTotalExpenses` function that:
@@ -54,8 +60,10 @@ function calculateTotalIncome(transactions: Transaction[]): number {
 // calculateTotalExpenses(transactions); // => 800  (500 + 300)
 function calculateTotalExpenses(transactions: Transaction[]): number {
   // write your code here...
-
-  return -1; // replace -1 with what you see is fit
+  const total = transactions
+    .filter((n) => n.includes("expense"))
+    .reduce((t, n) => t + n[1], 0);
+  return total; // replace -1 with what you see is fit
 }
 
 // `calculateNetTotal` function that:
@@ -65,8 +73,9 @@ function calculateTotalExpenses(transactions: Transaction[]): number {
 // calculateNetTotal(transactions); // => 2400  (3200 - 800)
 function calculateNetTotal(transactions: Transaction[]): number {
   // write your code here...
-
-  return -1; // replace -1 with what you see is fit
+  const netTotal =
+    calculateTotalIncome(transactions) - calculateTotalExpenses(transactions);
+  return netTotal; // replace -1 with what you see is fit
 }
 
 // `filterSignificantTransactions` function that:
@@ -81,8 +90,8 @@ function filterSignificantTransactions(
   threshold: number
 ): Transaction[] {
   // write your code here...
-
-  return []; // replace empty array with what you see is fit
+  const thingy = transactions.filter((n) => n[1] >= threshold);
+  return thingy; // replace empty array with what you see is fit
 }
 
 export {