Creating coupons for large orders

[KaliHerbs]

Hi everyone, I want to offer discounts for large volume orders, such as 10% off when purchasing $10.00, 15% off when purchasing $15.00, 20% off when purchasing $20.00 etc. How can I let buyers know about this when they are shopping in my store? Not completely sure how coupons work and either I am not reading it correctly or the answer is not within the help guidelines, thanks so very much for your help, Kali

[KaliHerbs]

HI everyone, does anyone have an answer to my question please? I want to offer discounts for large volume orders, such as 10% off when purchasing $10.00, 15% off when purchasing $15.00, 20% off when purchasing $20.00 etc. How can I let buyers know about this when they are shopping in my store? Not completely sure how coupons work and either I am not reading it correctly or the answer is not within the help guidelines, thanks so very much for your help, Kali