英文合約翻譯(只有兩句而已

After first transaction is completed, for the first six month, sale commission rate is 12%

After first transaction is completed, sales commission rate will be reduce to 9% for the following 6-18 month.

如果你需要兩個句子連在一起（在一個段落裡），請看下面的句子。

After first transaction is completed, for the first six month, commission rate is 12%.
For the following 6-18 month, sales commission rate would be decrease to 9%.

希望對你有幫助，謝謝你！

Very difficult to translate in example Chinese style:-
With all due respect on sales commission rate, the figures on 6 months, 7-18 months is 12%--9% respectively.

1.在雙方第一筆的交易發生後的半年內，傭金比率12%The commission rate will be 12% in accordance with the first trade of both parties after half of a year.
2.在雙方第一筆交易後發上的半年後到一年半內，傭金比率9%
And the rate will be 9% after the first trade happens from half of a year to a half and a year.

1. The sales commission rate is 12% within the first 6 months following the first transaction.

2. The sales commission is 9% within 6-18 months following the first transaction.