Q. Arvin Meritor is so pleased with outcome from previous suggestions that consultants are invited back for more work. Consultants now suggest a more complete robotic automation of making of muffler assemblies and also a reduction in container size to eight per container. Arvin Meritor implements se suggestions and result is that muffler assembly fabrication cell now averages approximately 32 assemblies per hour and catalytic converter assembly cell can now respond to an order for a batch of catalytic converters in 1 hour. safety stock remains at 0.125. Explain how many kanban cards are needed?