If you are selling it, and have a good income we should sell products that are popular or it is necessary to use because it is easier to buy from us the people.
If you sell it and have a good income, we should choose products that are popular or easy to use because it is necessary for people to buy goods from us.
If the sale of goods and have good income, we should choose to sell popular goods or มีความจำเป็นใช้ because of easy to people to buy products from us.