A young couple has made a deposit of the first month's rent (equal to

$1,000) on a 6-month apartment lease. The deposit is refundable at

the end of six months if they stay until the end of the lease.

The next day they find a different apartment that they like just as well,

but its monthly rent is only $900. And they would again have to put a

deposit of $900 refundable at the end of 6 months.

They plan to be in the

apartment only 6 months. Should they switch to the new apartment? Assume

an (admittedly unrealistic!) interest rate of 12% per month compounded monthly