Greetings friend @ireti.

I consider that to establish the price of a product or service, it is necessary to arrive at the determination of what I call "The Factor".

To find "The Factor" we must consider all the aspects that represent an expense, or in this case an "investment".
In this step, we must be very careful and study the entire economic and legal framework that surrounds the production and distribution chain. We cannot forget to include any aspect because this would represent a future loss for the company.

As a result of all this summation and subsequent average, we will find our "cost price".
Starting from this cost price then we can establish the "minimum sale price" which will include my "profit margin".
That's when the factor is born. It is that magic number that allows me to multiply with the cost price and obtain my minimum sale price.

Interesting article, I really liked it.

Your friend, Juan.