years. (Round to two decimal places.) years. (Round to two decimal places.) (Select the best answ standard. Data table se their payback perio in's standard. (Click on the icon here D in order to copy the contents of the data table below into a spreadshejt.) years. (Round to two decimal places.) years. (Round to two decimal places.) (Select the best answ standard. Data table se their payback perio in's standard. (Click on the icon here D in order to copy the contents of the data table below into a spreadshejt.)