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Brief Exercise 12-7 Novak Company ha will ower annuel varie e manufecturing costs rom $562,500 to $581 400 Prese e an dnd ys s showing eter he old machine should be retained or replaced. In the first two columns, enter costsend expenses as positive amounts, end 8ny mounts received 5 negative amounts. he hird column, enter net 'ncome increases as posrtive amounts and decreases as negative amounts. Enter nega rve mounts usang either negative st n preceding he number e -45 or parentheses e g s a actory machine ith a book value * 89,400 and a e ai ing useful life of 6 years. It can be sold fo 30,600. A ne achine is available at a cost or$530 200 This achine will have 6 year useful life ith no salvege value. The new machine Replace Retain Equipment Equipment Increase (Decrease) Vrableanufacturing costs New machine cost Sell old machine Tatel The old factory machine should te Work for aenShawack