Example

A developer has two design options for building a small apartment. One involves the use of timber and the other uses concrete. Financial data for the plans are estimated. Compare two plans on the basis of their present worth $($an interest rate of $12\%).$

$\backslash$table$[[,$Timber,Steel$],[$Initial cost $(),40,000,60,000],[$Annual maintenance cost $(),6,500,3,500],[$Residual value $(),5,000,0],[$Project life $($years$),10,15]]$