1. For maximum financial benefit and storage space utilization, order 405 syringes each time the inventory drops to 110 (about every 18 days). 2. For maximum financial benefit and storage space utilization, order 93 boxes of red top tubes each time the inventory drops to 55 (about every 17 days). 3. For maximum financial benefit and storage space utilization, order 198 boxes glass slides each time the inventory drops to 493 (about every 6 days).