Borges Machine Shop, Inc., has a $1-$year contract for the production of $250,000$ gear housings for a new off$-$road vehicle. Owner Luis Borges hopes the contract will be extended and the volume increased

next year. Borges has developed costs for three alternatives. They are general$-$purpose equipment $($GPE$),$ flexible manufacturing system $($FMS$),$ and expensive, but efficient, dedicated machine $($DM$).$ The

cost data follow:

The option GPE is best when the contracted volume is below

units $($enter your response as a whole number$).$

The option FMS is best when the contracted volume is between

and $325,000$ units $($enter your responses as whole numbers$).$

The option DM is best when the contracted volume is over

units $($enter your response as a whole number$).$