There are different ways to
be employed and make money.
You can work for an employer, who
hires you to do a job,
then pays you wages.
Or, you can work for yourself in your own business. To make
money, you can sell a product (a "thing") or a service (something
you "do").
What you sell can be things you make, things you do, or things
that other people make or do.
If you sell other people's things
or services ("reselling"), then you must charge a higher price
than what you paid in order to make money. Not only that, you
must charge enough to cover your expenses. What is left over
after your costs for goods and services, plus your expenses,
is called your "profit."
