I want to offer only certain website customers a discount. How can I build a button that shows the full price, but allows them to enter a code to access a reduced price? eg full price is $100 but if they have the promtion they only pay $90. They click the button and it says "price $100 enter any discounts", they enter their code and the price change to $90? Is this possible? If not how are people addressing this?
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