Why is my tax calculation incorrect for South Carolina State Tax?

[Maddhattercaps]

Subtotal	$25.00
Shipping (USPS first class)	$5.00
Tax (South Carolina State Tax 7.75%)	$0.39

Total

$30.39 USD

.39 is not the correct taxes 

[Mr_RaviRaj]

@Maddhattercaps 

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