Which of the following cost or revenue items will ALWAYS be irrelevant in a decision to continue producing units to be sold versus buying the units that will be sold? Multiple Choice Pred manufacturing overhead cost necessary for production of the units Purchase price of units that will be purchased from the outside vendor company if the decision is made to buy the units rather than to produce the units Direct Materials cost necessary for the production of the units, if they continue to produce me units Original cost of the production machinery currently being used to produce the units