Teddy Bower is an outdoor clothing and accessories chain that purchases a line of parkas at $10 each from its Asian supplier, Teddy Sports. Unfortunately, at the time of the order placement, demand is still uncertain: Teddy Bower forecasts that its demand is normally distributed with a mean of 1800 and a standard deviation of 1000 . Teddy Bower sells these parkas at $22 each. Unsold parkas have little salvage value: Teddy Bower simply gives them away to a charity (and also doesn't collect a tax benefit for the donation). How many parkas should Teddy Bower buy from TeddySports to maximize expected profit? (please use the normal distribution table and round up to the nearest integer)