A dietician is planning a snack package of fruits and nuts. Each ounce of fruit will supply zero units of protein, 3 units of carbohydrates, and 2 units of fat and will contain 20 calories. Each ounce of nuts will supply 3 units of protein, 1 unit of carbohydrate, and 4 units of fat, and will contain 30 calories. Every package must provide at least 3 units of protein, at least 13 unit of carbohydrates, and no more than 16 units of fat. Find the number of ounces of fruit and number of ounces of nuts that will meet the requirement with the least number of calories. What is the least number of calories.