Consider your computations for problem $1\mathrm{.}6$ modified. Which of the following best

interprets Resin productivity last year?

Last year for each unit of Resin, we are able to produce $20$ units of output $($bearings$).$

Last year for each unit of output, it required $20$ units of Resin.

Last year it required $20$ units of Resin, to produce $20$ units of output $($bearings$).$