Could you correct the following sentences pls?

Hi everyone! Can you correct the following sentences pls? Correct everything that seems unnatural to you! You might have problems getting the meaning of some sentences. Don't worry...I had them as well while translating these sentences from my first language into English.

1. The statistics have shown this month that the consumer demand for our production tends to decrease. But as far as we are aware, our experts have not analyzed the situation in detail yet.


2. The leading companies have already stopped the production of the goods that are typically used in wartime because their marginal utility has changed lately.


3. We have bought the apartment at the current price this year. The purchase was a financial sacrifice but it was successful. The prices of apartments have varied from high to very high. They have never tended to decrease.


4. Has the government ever interfered in market prices through price controls and ration stamps in order to be confident that the prices of vital consumer goods will not go up too high?


5. Since this commodity became freely available the demand for it has fallen sharply. Its utility has changed. I have never thought before that the utility of a commodity is directly related to the quantity which is available to the consumers.


6. -There has appeared a wide variety of cosmetic goods lately. Have you ever tried to rate the quality of this production by comparing prices?

-Yes, of course. But I have never purchased a commodity without carefully analyzing the information presented by the producer and experts on the field.

7. -Alisa, have you drawn up the list of the foodstuffs that we need to buy for the week yet?

-Not yet. I have been thinking it over for 30 minutes running but I have not made a final decision yet. I have just heard a new butter commercial (a commercial for a new type of butter) and I want to try this butter.

-I have never believed advertisements. But this one sounds convincing. Let’s risk!