Customers can choose different products they want to purchase and then pay for all of them at the same time. The software automatically computes how much the sales tax will be, as well as the shipping fee.

There are many ecommerce software which allow customers to choose their shipment method and displays different prices depending on their selection.
eCommerce software is basically integrated with your website, while there are some software which your domain provider may also offer you as well for a monthly fee aside from the domain itself.
There are many reasons why you need eCommerce software for your business, especially if you want the ability to accept payments online and sell your goods online as well.
eCommerce software helps keep your customer's payment information safe and sound. This helps create a more pleasant shopping experience, not to mention makes the whole transaction easier and faster. In order to choose the right one, determine how many products you will make available to your customers. Some only accommodate up to 100 products, so you need to choose the software that can cater to all the products you are going to offer.
Will you be offering physical and downloadable products? If so, look for eCommerce software that gives you the ability to email customers the download link after their payment has been successfully processed, in addition to collecting their shipping information for physical products.
Will you be offering payment plans for your products or need recurring billing, like for memberships? If so, choose the software that allows for recurring payments so that your customer's payments will automatically be taken out after a certain number of days from their credit card.
If you have a lot of customers in your business, make sure to choose eCommerce software with unlimited storage. This will help you keep customer records and also allows you to have a reference for older transactions.