@Simona-Polackova, thanks for the reply, but I'm still unclear about the taxes. The tax rate for online sales in South Carolina is 6.00% but the rate on the donation is 7.50%.
@Clearphish, yes, I too had a question about taxes. I'm in the United States and haven't had taxes added to a donation before. I'm thinking that this is not like a local, sales tax. Where does the collected tax money go?