Question $6$

Furniture Face Lift refinishes old wood furniture. Their process for refinishing chairs has $8$ workers and $4$ stations. Each chair starts at the Stripping station, then goes to Priming, then to Painting and finally to Inspection. Where there are multiple workers within a station, each worker works independently on his$/$her own chair. Assume inventory buffers are allowed between each station.

$\backslash$table$[[$Station$,$Staffing,$\backslash$table$[[$Processing time $($hours per chair per$],[$worker$)]]],[$Stripping$,3,2\mathrm{.}5],[$Priming$,2,1\mathrm{.}5],[$Painting$,2,1],[$Inspection$,1,0\mathrm{.}8]]$

Suppose at the start of the day there is no inventory of chairs in the shop. That is$,$ there are no chairs within any of the stations or between them in any buffer. A truck loaded with $18$ chairs arrives. How many hours will it take them to complete these $18$ chairs?

$($The accuracy should be of two digits after the decimal places.$)$

Integer, decimal, or E notation allowed