A machine shop has three options for a new milling machine. Machine Orpheus has a fixed cost of $\backslash (\backslash$$ $5,000\backslash ),$ Machine Rex has a fixed cost of $\backslash (\backslash$$ $15,000\backslash ),$ and the Zulu Machine has a fixed cost of $\backslash (\backslash$$ $25,000\backslash ).$ The per$-$unit cost to operate the equipment is $\backslash (\backslash$$ $12\backslash )$ for Orpheus, $\backslash (\backslash$$ $8\backslash )$ for Rex, and $\backslash (\backslash$$ $6\backslash )$ for Zulu. For what range of output is it best to purchase an Orpheus?a$.0$ to $2,500$ unitsb. $0$ to $3,333$ units

c$.0$ to $5,000$ units

d$.$ It is always cheaper to have an Orpheus.