The Albgold cheese dairy produces very famous beer cheese. It markets this cheese in four degrees of maturity: Fresh beer cheese 2 months maturing time $6.00 per lb Young beer cheese 9 months maturing time $9.50 per lb Middle-aged beer cheese 14 months maturing time $12.00 per lb Aged beer cheese 24 months Maturing time $20.00 per lb The cheese maker's decision on whether to continue to mature or sell one lb of fresh beer cheese is a form of investment: She can either sell the fresh beer cheese immediately or let it mature further. If she sells it now, she will immediately receive $6.00. If she allows the cheese to continue to mature, she will