The monthly sales for Yazici Batteries, Inc., were $as$ follows:

This exercise contains only parts $b$ and $c.$

$b=23$ sales $(round$ your response $to$ a whole number$).$

The forecast for the next period $(Jan)$ using $a3-$month moving average approach $=21\mathrm{.}3$ sales $(round$ your response $to$ two decimal places$).$

The forecast for the next period $(Jan)$ using $a6-$month weighted average with weights $of0\mathrm{.}10,0\mathrm{.}10,0\mathrm{.}10,0\mathrm{.}20,0\mathrm{.}20,$ and $0\mathrm{.}30,$ where the heaviest weights are

applied $to$ the most recent month $=19\mathrm{.}1$ sales $(round$ your response $to$ one decimal place$).$