Consider the following actual and forecast demand levels for Big Mac hamburgers at a local McDonald's restaurant:

$\backslash$table$[[$Day$,$Actual Demand,Forecast Demand$],[$Monday$,88\mathrm{.}00,88\mathrm{.}00],[$Tuesday$,72\mathrm{.}00,88\mathrm{.}00],[$Wednesday$,68\mathrm{.}00,84\mathrm{.}00],[$Thursday$,48\mathrm{.}00,80\mathrm{.}00],[$Friday$,-,?$