You
have a choice between a 30-year fixed rate loan at 3.5% and an
adjustable rate mortgage (ARM) with a first year rate of 2%.
Neglecting compounding and changes in principal, estimate your
monthly savings with the ARM during the first year on a 250,000
loan. Suppose that the ARM rate rises to 10% at the start of the
third year. Approximately how much extra will you then be paying
over what you would have paid if you had taken the fixed rate
loan?