An earbud manufacturer has hired you to manage its inventory. They have 10,000 items that need to be managed. They classify 10% of the items as A items that need to be counted once per month, 30% are B items that are counted once per quarter, and 60% are C items that are counted once per year. There are 25 business days per month. How many items do they need to count each business day? 100 120 150 40