Rachel Wilson owns Campus Copies. a copy business with several high$-$speed copy machines One is a colour copier that was purchased just last year at a cost of $226\mathrm{.}000.$ Recently a salesperson get Rache to witness a demo of a new $24\mathrm{.}000$ colour copier that promises higher speed and more accurate colour representation Rachel is interested but she can't get herself to trade in a perfectly good copier for which she paid $226\mathrm{.}000$ and replace it with one that will cost $24\mathrm{.}000$ Write a paragraph explaining why the cost of the old copier is irrelevant to Rachel's decision