A 12-year-old with type 1 diabetes mellitus is preparing to eat lunch. Their meal tray includes: 1 slice of bread = 15 g carbohydrates 1 medium apple = 25 g carbohydrates 1 cup milk = 12 g carbohydrates 1 granola bar = 23 g carbohydrates Their pre-meal blood glucose is 193 g/dL. Insulin parameters are as follows: Target blood glucose: 80-120 mg/dL Insulin-to-carbohydrate ratio: 1 unit of insulin per 15 grams of carbohydrate (1:15) Correction dose of insulin: Pre-meal blood glucose 121-180 mg/dL: 1 unit Pre meal blood glucose 181-200 mg/dL: 2 units What is the total amount of insulin the patient will require?