which supplier has the most efficient one. The standard time allowed for routine maintenance is $2$ hours. Choi's company records the results, "how long does each supplier complete the routine maintenance?" $($See the table$).$ Calculate the suppliers' efficiency and the average efficiency.

$\backslash$table$[[$Supplier$,\backslash$table$[[$Actual time required to perform$],[$routine maintenance $($hours$)]],\backslash$table$[[$Actual performance$],[($per hour$)]],\backslash$table$[[$Standard time to perform$],[$routine maintenance$],[($hours$)]],\backslash$table$[[$Standard$],[$performance $($per$],[$hour$)]]],[$ABC company,$1\mathrm{.}7,2,,],[$Preztel$,2\mathrm{.}4,,,],[$SCR industries,$1\mathrm{.}9,,,],[$BeetleBob$,1\mathrm{.}8,,,]]$

Keys to solve it

Output is not measured by a processing time, and output is the actual performance, such as the number of units produced for a certain period. For example, two products are produced per hour.

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