The patient is scheduled to receive insulin NPH 25units with breakfast. The patient is currently NPO for surgery. Prior to surgery, the patient's blood glucose (BG) is 180 mg/dL. How many total units of insulin will the patient receive prior to surgery based on the following sliding scale? Do not provide the unit of measurement. Only provide the number. Insulin Dose BG Reading 0 units <160 mg/dL 2 units 160-220 mg/dL 4 units 221-280 mg/dL 6 units 281-340 mg/dL 8 units 341-400 mg/dL