a manager has an option to purchasing one two or three machines it's cost and potential volumes are as follows machine number one total annual fixed cost $$9,600$ corresponding range of output $0$ to $300$ machine number two total annual fixed cost $$15,000$ horsepower Ranger output $301$ to $600$ machine number three toilet and your fits cost $$20,000$ corresponding Ranger Outlet $601$ to $900$ forever cost is $10$ dollars per unit and revenue is $$40$ per unit determine the break$-$even point for each range if projected annual demand is between $580$ and $660$ units how many machines