Requirement $1.$ Classify each item as a prevention cost, an appraisal cost, an internal failure cost, or an external failure cost.

$\backslash$table$[[$Type of Quality C$,,$Cost$],[$Appraisal$,,$Strength$-$testing one item from each batch of panels$],[$Prevention$,,$Training employees in TQM$],[$Prevention$,,$Training suppliers in TQM$],[$External failure,grad,Identifying preferred suppliers who commit to on$-$time delivery of perfect quality materials$]]$