Can someone evaluate mine? Thanks in advance! 
In this argument, the publisher of the Mercury reaches to the conclusion that The Mercury should reduce its price below that of The Bulge, in order to attract more people to read and more businesses to buy advertising space in the paper. The basis of this recommendation is that The Mercury's circulation has declined since a competing lower-priced newspaper, The Bulge, was started 5 years ago. At first glance, the argument appears to be somewhat convincing, but further scrutiny reveals that the argument omits some important concerns that should be addressed to substantiate the argument.
Most conspicuously, the argument commits a fallacy of causal simplification by attributing the decline of The Mercury's circulation to the competing lower-priced newspaper. While the price of a newspaper might be an important element in determining the overall circulation of a newspaper, it is hardly the only element. There are also many other elements contributing to the circulation, such as the content of the newspaper, the political position of the newspaper, and so on. Until all of these factors are ruled out, the argument is unwarranted to claim that the decline of The Mercury's circulation was due to the lower-priced competitor.
Moreover, the argument unfairly assumes that there will be more people reading the newspaper if its price is reduced. While the price of a newspaper could be a factor for readers to consider when buying a newspaper, there are way more factors involved in the circulation of a newspaper. What if the conventional readers of The Mercury prefer to read the digital version of it rather than the traditional physically printed version of it? What if the quality of The Bulge newspaper has been much better than the quality of The Mercury newspaper all the time? Without providing sufficient evidence to rule out these possibilities, the assumption is unfounded.
Finally, the argument falsely depends on another assumption that there will be more businesses buying advertising space in the paper as long as its circulation is increased. However, there is no evidence stated for this assumption. Even though it is indeed the case that businesses used to buy more advertising space in the paper when its circulation is more, it does not mean that it will still be the case for the present and the future. What if businesses switch to buy advertising space on websites rather than on physical newspapers? Hence, the argument would have been more convincing if it had illustrated why businesses are motivated to buy advertising space in the paper when its circulation is more.
To sum up, the conclusion that the newspaper should reduce its price is seriously undermined by numerous flaws identified in the reasoning above. If the reasoning was taken into account, the argument will be more thorough and convincing.