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Question $19$

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A company has introduced a process improvement that reduces processing time for each unit, so that output is increased by $25\%$ with less material, but one additional worker required. Under the old process, five workers could produce $60$ units per hour. Labour costs are $$12/$hour$,$ and material input was previously $$16/$unit$.$ For the new process, material is now $$10/$unit$.$ Overhead is charged at $1\mathrm{.}6$ times direct labour cost. Finished units sell for $$31$ each. What is the productivity AFTER the process improvement $($in $ of output $/$ $ of input$)?$

Question $19$ Select one:

a$.$

$1\mathrm{.}667$

b$.$

$1\mathrm{.}913$

c$.$

$2\mathrm{.}481$

d$.$

$2\mathrm{.}571$

e$.$

None of the given choices