PLEASEE help with question 8-9 and 10.. pleaseee

8).just in time inventory management is a method under which the inventory comes in (in many cases) just hours before it is needed. Name at least one plus and one minus of this system? 9) A company sells all if it's inventory on the following terms: 1/10 net 30. What does this 10-why do companies extend "trade credit" (example allowing customers 30 days to pay) to their customers-what might happen if they don't