Southron Inc. makes electrical appliances such as toasters, irons and dustbusters. The flexible $($variable$)$ cost per unit is $$15.$ Fixed cost is $$250,000$ per month. The appliances are sold to retailers for $$25$ each, on average. To make a profit of $$100,000,$ it will be necessary to sell how many units?

Question $30$ options:

$50,000$

$35,000$

$40,000$

None of those provided

$45,000$