Chicago co$.$ expects the exchange rate of the New Zealand dollar $($NZ$$)$ to appreciate from its present level of $$0\mathrm{.}50$ to $$0\mathrm{.}52$ in $30$ days. Chicago co$.$ is able to borrow $$20m($or $NZ$$$40m)$ on a short$-$term basis from banks. Annualized interest rate in the interbank market are as follows. Find speculative profit that the company can make based on its expected appreciation of $NZ$$ $?$

$\backslash$table$[[$Currency$,$Deposit rate,Borrowing rate$],[$U$.$S$.$ $$,6\mathrm{.}72\%,7\mathrm{.}20\%$