In this task, you will be shown an incorrect English sentence. You need to generate a corrected form of the input sentence.

In a market economy the price must reflect costs of the product and consumer 's willingness to buy the product . 
In a market economy , the price must reflect costs of the product and consumers ' willingness to buy the product . 

It 's is very obbvious that more cars will be sold there . 
It is very obvious that more cars will be sold there . 

this is because of their knowledge on many subjects . 

That is because of their knowledge on many subjects . 

