Reply To: checkout page is not work

Hi there,

Thank you so much for your prompt reply!
I already got the correct checkout page, thank you!
But I have one more question about coupon function, it does’t work when I try to put the discount code at checkout page.
Could you help to check my screen shot about the coupon setting as below. And I wonder how to set the “A”model to be the fixed product for discount?

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