Typically, commissions are paid based on the purchase price of goods and services that you sold. However, some companies use different commission bases, like the item’s net profit or the item’s cost to the company. Ask if there are any products or services excluded from the commission plan. A company may pay you a commission for selling certain products and services but not others. The commission payment rate could be, for example, 5% of the selling price of all goods sold. Alternatively, your company might offer a flat commission rate (for example, $25 for every sale you make). The company may set different commission rates for different types of products. For example, it may pay 6% commission on a product that’s hard to sell and only 4% commission on a product that’s easy to sell. For example, in some plans, your commission rate changes after you sell a certain amount of product or if you reach a specific quarterly goal. This is called an override.  In a tier-based commission system, for example, your commission rate might increase to 7% after you sell $50,000 worth of product. Some commission plans may involve splitting the commission if you make a sale or complete a project jointly with another employee.

How would you rephrase that briefly using Chinese?
了解你的佣金基数。 确定公司的佣金率。 了解佣金制度中的其他细微差别。