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 and each station has inventory to work on at the beginning of the day

Station Staffing Processing time (hours per chair per worker)
Stripping 3 2.5
Priming 2 1.5
Painting 3 1.75
Inspection 1 0.8

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 10 chairs arrives. How many hours will it take them to complete these 10 chairs?