1) when somebody buys something off of the website there is no sales tax charged. If they are in the state of California then I need to charge sales tax. And depending on what county in California will determine the tax rate. Generally speaking the tax rate would be 9.25%.
2) if somebody buys more than one item of the same kind they only get charged shipping for one item rather than to shipping charges. The things that I ship are very heavy and expensive to ship so I need to charge for each item that they purchase.