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Additional Algo $5-7$ Flow$-$Dependent Processing Times

A sandwich shop has three types of customers $($sandwich$-$only, soup$-$only, and combo$).$ The shop has three workstations, each staffed by a single worker $($sandwich$,$ soup, and checkout$).10$ sandwich$-$only customers arrive each hour and spend $5$ minutes at the sandwich workstation and $2$ minutes at the checkout but do not visit the soup station. $5$ soup$-$only customers arrive each hour spend $7$ minutes at the soup station and $2$ minutes at the checkout but do not visit the sandwich station. $4$ combo customers arrive each hour and spend $5$ minutes at the sandwich station, $6$ minutes at the soup station and $3$ minutes at the checkout.

What is the flow rate of soup$-$only type customers?

Note: Round your answer to $1$ decimal place.

Answer is complete but not entirely correct.

$1\mathrm{.}0$ customers per hour