The Cool$-$Tech Company $($see $1$ above$)$ also produces desk fans at a standard price of $$25\mathrm{.}00.$ During May, $1,872$ desk fans were produced on $11$ working days $($of $8$ hours each$).$ On one day two employees called in sick. $(2$ points$)$

a$.$ Determine the labor productivity of the desk fans.

b$.$ Was productivity higher for the window fans or for the desk fans in May?