Assume the couple purchases a home with a $$400,000,$ fixed$-$rate mortgage $($fixed$-$rate mortgages are compounded semi$-$annually in Canada$)$ and they opt for monthly payments, a term of $5$ years at a rate of $6\mathrm{.}2\%,$ and an amortization period of $25$ years.

All else equal, if they had chosen instead an accelerated bi$-$weekly payment, how much interest would they save over the life of the mortgage? Round to the nearest dollar:

$1)$ Calculate total interest with monthly payments

$2)$ Calculate total interest with Accelerated Bi$-$weekly Payments

$3)$ Calculate total interest saving