Preguntas sobre ejemplos de oraciones con, y la definición y uso de "Firms"

A: Companies had the time and resources necessary to increase the capacity of their systems before there was expected to be a large sudden demand for their services (but because nobody actually compelled them to do it, they chose not to do so, and instead their systems were overloaded from the sudden increase in demand).

A: In this situation, “firm” is talking about people who are a part of a business, not an object.

A: You must be able to make enough of what you are selling.
A backlog is a customer waiting for something.
Boeing has a backlog of planes on order.

A: × ‎ Firms get their advertisements into the markets so that they sale their products more.
✓ ‎Businesses put their advertisements outside their stores so that they sale their products more. (I assume that you mean the place where the products are sold with "market")

× Today, we have exposed to more and more advertisement since the SNS was invented.
✓ Today we are exposed to more and more advertisement since the SNS was invented. (No comma needed)

× Besides, the online shopping make us easy to buy goods anywhere.
✓ Besides online shopping makes it easy for us to buy goods anywhere. (No comma needed)

× As the result, advertisements encourages dramatically us to buy goods.
✓ As the result advertisements encourages us dramatically to buy goods. (No comma needed)

× In my experience, I bought a good, which is not cheap, soon after I felt like buying it.
✓ In my experience I bought a product which is not cheap soon after I felt like buying it. (No commas needed; goods doesn't really have a singular or at least it's never used)

× It increase the benefits and income of firms and it turns to the benefits in whole society, so advertisements are seemingly contribute to the society.
✓ It increase the profit and income of firms and it contributes to the benefits of the whole society, so advertisements are seemingly a contribution to society.