The correct answer to this open question is the following.
Although the question does not provide any context, references, or give options, we can say that if changes happen during September or October, the expenses you will be able to change most easily are according with the provisions projected in the annual plan, the budget, compared with the monthly expenses.
That is why a company has to elaborate on a good financial plan and overseeing the projections and true sales of the marketing and sales plan. This is important to take the proper control of expenses and revenues. Depending on the volume of sales during September and October, you can decide what kind of changes or adjustments to make in the following months.
