Chris manages Cookie Monster's a commercial bakery that operates 12 hours per day 260 days per year. He needs to meet a daily demand of 22,000 cookies per day. He is currently implementing lean techniques in the kitchen. Chris intends to use "work-in-process" shelves as a kanban signal in the kitchen area. Each shelf can hold one cookie tray. Since the standard industrial cookie tray holds 10 dozen cookies, he assumes a "kanban container size" of 120 units. Chris performed a time study on the cookie packaging workstation and discovered the following: average wait time is 3 minutes - average handling time is 2 miutes average processing time is 4 minutes. In addition, management has established a safety stock policy of 120 seconds. What is the demand rate per minute for cookies? cookies per minute (Please round to one decimal place) How many kanban shelves should Chris place in front of the packaging workstation? shelves (Please round up to the next whole number)