After synching up my Shopify store of

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I hooked up Coinbase Commerce to accept crypto on the store. After doing 3 test sales, one person mentioned how they paid a 25% fee which tells me this could be hefty Eth gas fees. The others were done on DAI which should have lower transaction fees. 

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I checked which coins are supported

"We currently support ApeCoin, Bitcoin, Bitcoin Cash, DAI, Dogecoin, Ethereum, Litecoin, SHIBA INU, Tether and USD Coin"

Get more info here with the FAQ: 

coinbase.com/commerce/faq

These are the lowest transaction fees according to CoinCodex:

coincodex.com/article/22831/cheapest-crypto-to-transfer/

Which crypto coin offers lowest transaction fees? - QUANTLABS.NET