$1\mathrm{.}1$ Chuck Sox makes wooden boxes in which to ship motorcycles. Chuck and his three employees invest a total of $40$ hours per day making

the $120$ boxes.

a$.$ What is their productivity?

b$.$ Chuck and his employees have discussed redesigning the process to improve efficiency. If they can increase the rate to $125$ per day,

what will be their new productivity?

c$.$ What will be their unit increase in productivity per hour?

d$.$ What will be their percentage change in productivity? $Px1\mathrm{.}3$ This year, Druehl, Inc., will produce $57,600$ hot water heaters at its plant in Delaware in order to meet expected global demand. To

accomplish this, each laborer at the plant will work $160$ hours per month. If the labor productivity at the plant is $0\mathrm{.}15$ hot water heaters per

labor$-$hour, how many laborers are employed at the plant?$1\mathrm{.}6$ George Kyparisis $($using data from Problem ${1\mathrm{.}5}^{})$ determines his costs to be as follows:

LABOR: $$10$ per hour

RESIN: $$5$ per pound

CAPITAL EXPENSE: $1\%$ per month of investment

ENERGY: $$0\mathrm{.}50$ per BTU

Show the percent change in productivity for one month last year versus one month this year, on a multifactor basis with dollars as the common

denominator. PX