Here I share with you an excellent article which I found really helpful.
Article - What is your profit on online sales
Online selling is one of the best source of income for people, but there are several factors which we need to know.
One of it is accounts, You need to track your inventory, Sale, return and refund.
It
becomes very difficult for seller to keep a track on how the sales is
going and what is the profit he is making out of the business. With the
below calculation yes you can know the perfect amount which your are
making as your profit.
After lots of experiment and calculation, Below I will show you how.