Maggie Moylan Motorcycle Corp. uses kanbans to support its transmission assembly line. Determine the size of the kanban for the mainshaft assembly and the number of kanbans needed. Setup cost = $20 Annual holding cost of mainshaft assembly = $250 per unit Daily production = 300 mainshafts Annual usage = 20,000 (= 50 weeks 5 days each * daily usage of 80 mainshafts) Lead time = 3 days Safety stock = 1 2 days production of mainshafts