diff --git a/Work/mortgage.py b/Work/mortgage.py
index d527314e3..69f584723 100644
--- a/Work/mortgage.py
+++ b/Work/mortgage.py
@@ -1,3 +1,22 @@
 # mortgage.py
-#
-# Exercise 1.7
+principal = 500000.0
+rate = 0.05
+payment = 2684.11
+extra_payment = 1000.0
+total_paid = 0.0
+months = 0
+
+# First year with extra payments
+for month in range(12):
+    principal = principal * (1 + rate / 12) - (payment + extra_payment)
+    total_paid += (payment + extra_payment)
+    months += 1
+
+# Remaining months without extra payments
+while principal > 0:
+    principal = principal * (1 + rate / 12) - payment
+    total_paid += payment
+    months += 1
+
+print('Total paid:', total_paid)
+print('Months required:', months)