Gruten Retailers sells Mothers Day special greeting cards at their store at $6. They make the cards for a dollar a piece. Most of the cards are sold by Mothers Day, but the actual demand is unknown. They have orders for 120 cards. In the past, they have had sales of at least 100 cards by Mothers Day. The remaining cards are sold at a 40 percent discount. Calculate the net profit, if demand, D, is set at 110 units.