create a $12$ month forecast for product A in card units. Starting with nov $2010$ up to sep $2011.$ assume that the forecast for oct $2010$ is $150$ units. And a is $0\mathrm{.}2$

product a Oct$-10$ nov dec Jan$-11$ feb mar

actual demand $1631327389128104$

apr May june jul aug sep

actual demand aa$151021277369129$