If you want to charge for shipping it is mandatory that you supply the weight of the product. It is my recommendation that even if you do not want to charge for shipping, you should get the weights of the product anyway. Many people choose to charge for shipping after the site is created and these weights have to be added to all the product descriptions and the sales cart components, in a sense, doing them all over and this can be costly. You can choose to add shipping to the cost of each item and not charge the customer separately for shipping. If you do not charge tax, you can add a small amount to each product to cover tax.
Tax is very hard to calculate as it is different in virtually each city or county in each state.
It will give you an online secure control panel to view all your orders and the customers credit card information. 125.00 per year and a certificate is issued that will secure your site for safe shopping. Pro the e-commerce software to manage your products approx. If you have the web designer manage the site for you, the fee will be determined depending on how many updates and changes are needed.