what is the basic logic of how profits are earned in the business of Alibaba group. and how many units of a business's profits must be sold for the business to "break even" and then start earning a profit. - Items to include:

Revenue drivers and profit margins.

Fixed and variable costs.

Operating leverage* and its implications.

Start-up costs (including legal expenses, fees for business licences and permits, website design, business logo design, etc.)

• break even analysis

please provide all above information of Alibaba E- commerce company.