The table below shows actual Demand, and a Forecast of the Demand.

Period

Demand, Dt

Forecast, Ft

$1$

$37$

$37\mathrm{.}00$

$2$

$40$

$37\mathrm{.}00$

$3$

$41$

$37\mathrm{.}90$

$4$

$37$

$38\mathrm{.}83$

$5$

$45$

$38\mathrm{.}57$

Calculate the Mean Absolute Deviation $($MAD$).$ Answer to $2$ decimal places.