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

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

b$)$ The forecast for the next month $($Jan$)$ using the naive method $=23$ sales $($round your response to a whole number$).$

The forecast for the next period $($Jan$)$ using a $3-$month moving average approach $=$ sales $($round your response to two decimal places$).$

The forecast for the next period $($Jan$)$ using a $6-$month weighted average with weights of $0\mathrm{.}10,0\mathrm{.}10,0\mathrm{.}10,0\mathrm{.}20,0\mathrm{.}20,$ and $0\mathrm{.}30,$ where the heaviest weights are applied to the most

recent month $=$

sales $($round your response to one decimal place$).$