A commission of 10% is to be paid ___________ all sales,  w

A commission of 10% is to be paid ___________ all sales,  whether from you or direct ____________ consumers.
【正确答案】：on, from
【题目解析】：on sales廉价出售，贱价抛售；from consumer来自消费者句意：无论你方还是消费者直接向你方支付10%的佣金。