woot!

exercises/4-mortgage-calculator/README.md

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+## Mortgage Calculator
+
+Make a mortgage calculator that returns your monthly payments based on the following mortgage equation:
+
+    M = P( i/12( 1+i/12 )^n )/( ( 1+i/12 )^n - 1 )
+    
+Check out the assert test given. See if you can write two more 'assert' statements.
+
+Make a table that shows all of the monthly payments and the change in balance based on the payments

exercises/4-mortgage-calculator/mortgage_calculator.py

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+def mortgage_calculator():
+    pass
+
+assert mortgage_calculator(100000, 0.05, 120) == 1060.66, str(mortgage_calculator(100000, 0.05, 120)) + " !=  1060.67"