diff --git a/code/module-03/m03-start/module03.ts b/code/module-03/m03-start/module03.ts
index 5640072..cae443d 100644
--- a/code/module-03/m03-start/module03.ts
+++ b/code/module-03/m03-start/module03.ts
@@ -11,21 +11,21 @@
 
 /*  TODO: Update the calculateInterestOnlyLoanPayment function. */
 
-function calculateInterestOnlyLoanPayment(principle, interestRate) {
+function calculateInterestOnlyLoanPayment(principal, interestRate) {
     // Calculates the monthly payment of an interest only loan
     let interest = interestRate / 1200; // Calculates the Monthly Interest Rate of the loan
     let payment;
-    payment = principle * interest;
+    payment = principal * interest;
     return 'The interest only loan payment is ' + payment.toFixed(2);
 }
 
 /*  TODO: Update the calculateConventionalLoanPayment function. */
 
-function calculateConventionalLoanPayment(principle, interestRate, months) {
+function calculateConventionalLoanPayment(principal, interestRate, months) {
     // Calculates the monthly payment of a conventional loan
     let interest = interestRate / 1200; // Calculates the Monthly Interest Rate of the loan
     let payment;
-    payment = principle * interest / (1 - (Math.pow(1 / (1 + interest), months)));
+    payment = principal * interest / (1 - (Math.pow(1 / (1 + interest), months)));
     return 'The conventional loan payment is ' + payment.toFixed(2);
 }