$1.$ Productivity $5$ marks $[CLR1]$

Tomas Zelinski, a Polish road cyclist, immigrated $to$ Canada after his racing career ended. Tomas makes wooden boxes $in$ which $to$ ship high end racing bikes. Tomas and his $3$ employees invest a total $of40$ hours per day making the $120$ boxes.

A Calculate the productivity $of$ Tomas and his three employees?

$B$ Tomas and his employees have discussed redesigning the process $to$ improve efficiency. $If$ they can increase the rate $to125$ per day, what will their new productivity $be?$

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

$D$ What will $be$ their $\%$ change $in$ productivity?