A seller is communicating to a buyer to sell formal shirt. The shirt featuring heart-beat monitoring system wchich will give early warning for heart attack. The seller demanded $100 per unit for a minimum quantity of 500 units. The price may reduce for higher quantity. The plant's capacity is 5000 units. The manufaturng cost of this shirt is $80 and toher expense is $5. The product is innovative in nature. The buyer offered $80per unit. After few negotiation meetings, the negotiated price stands at $90. Please discuss position, interest, needs, wants, BATNA, and ZOPA