Problem $18-23($Algo$)$

After using your forecasting model for six months, you decide to test it using MAD and a tracking signal. Here are the forecast and actual demands for the six$-$month period:

$\backslash$table$[[$PERIOD$,$FORECAST,ACTUAL$],[$May$,455,470],[$June$,505,555],[$July$,555,370],[$August$,595,455],[$September$,630,670],[$October$,720,615]]$

a$.$ Find the tracking signal.

Note: Negative values should be indicated by a minus sign. Round your answers to $2$ decimal places.

$\backslash$table$[[$Period$,$Tracking Signal$],[$May$,0\mathrm{.}17],[$June$,0\mathrm{.}56],[$July$,(2\mathrm{.}07)$