. Q6.18. An international textile company's North America Division must decide which type of fabric cutting machines it will use- straight knife or round knife. The estimates are summarized below. Compare them on the basis of annual worth values at i= 10% per year using (a) factors, and (b) single cell spreadsheet functions. Round knife Straight knife First cost (S) -250,000 -170,000 AOC, $ per year -31,000 -35,000 Overhaul in year 2, $ -26,000 Salvage Value, $ 40,000 10,000 Life , years 6 4