You are buying an antique type$-$writing machine for $$850.$ You are making some down payment and financing the rest by paying $$40$ each month for $18$ months at

$8\%.$ What is the amount of down payment?

Multiple Choice

$$130\mathrm{.}00$

$$126\mathrm{.}56$

$$173\mathrm{.}64$

$$154\mathrm{.}66$