f a company invests in production improvement option D that will boost labor productivity by $50\%,$ while its annual depreciation costs will rise by an amount equal to $10\%$ of the investment costs associated with installing option D$,$ it is accurate to say that its labor costs per pair produced will decline

from $$5\mathrm{.}00$ per pair to $$2\mathrm{.}50$ for a production facility in Latin America that currently has labor productivity of $4,000$ pairs per worker and total regular compensation $($which does not include overtime pay$)$ of $$20,000$ annually.

will be greatest at Asia$-$Pacific plants having comparatively low total annual compensation per employee as compared to North American plants having comparatively high levels of annual compensation per employee.

from $$8\mathrm{.}00$ per pair to $$6\mathrm{.}40$ for a production facility in Europe$-$Africa that currently has labor productivity of $4,000$ pairs per worker and total regular compensation $($which does not include overtime pay$)$ of $$32,000$ annually.

by $50\%$ per pair at any production facility of any size capacity because the gains in labor productivity are $50\%$ irrespective of what other differences in labor$-$related conditions may exist.

from $$8\mathrm{.}00$ per pair to $$5\mathrm{.}33$ for a production facility in North America that currently has labor productivity of $5,000$ pairs per worker and total regular compensation $($which does not include overtime pay$)$ of $$40,000$ annually.