Given the following manufacturing precedence relationships and assuming eight working hours a day and $446$ products need to be produced per day,

$\backslash$table$[[$Task$,$Description,Task Time $($seconds$),$Preceding Task$],[$A$,$Punching,$30,],[$B$,$Bending,$54,$A$],[$C$,$Combining,$31,$B$],[$D$,$Painting,$46,$C$],[$E$,$Polishing,$64,$D$]]$

What is the the minimum number of workstations? $($ DO NOT round up your answer to whole number. Keep two decimal points.$)$