A linear time series model was developed from the actual data above $($Rexford Rehearsals$)$ as Y $=311\mathrm{.}21+3\mathrm{.}916$t$.$ The seasonal indexes are: Q$1-110\mathrm{.}6$; Q$2-127\mathrm{.}3$; Q$3-90\mathrm{.}3,$ Q$4-71\mathrm{.}8.$