Raider Wheels uses a weighted moving average method to forecast bicycle tire sales. It assigns a weight of $0\mathrm{.}5$ to the previous month's demand, $0\mathrm{.}3$ to demand two months ago, and $0\mathrm{.}2$ to demand three months ago. If sales amounted to $1000$ units in May, $2200$ units in June, and $3000$ units in July, what should be the forecast for August? $17602560$O $248026402360$