应纳消费税=(20000+20000×10%+1x2000×0.5)÷(1-20%)×20%
应纳消费税=(20000+20000×10%)÷(1-20%)×20%+1×2000×0.5
应纳消费税=(20000+20000×l0%+1×2000×0.5×20%+1×2000×0.5
应纳消费税=(20000+20000×10%+1×2000×0.5)÷(1-20%)×20%+1×2000×0.5