An important difference between accounting and other business functions, such as marketing and management, is that:

Accounting= keeping financial accounts

Explanation:

The job of accounting has a different and important job which is to perform the action or process of keeping financial accounts while everything else in business(marketing, management, etc etc) do not have the same important role that accounting does.

Accounting usually gives us an insight on how healthy the company's finances are, and how it has been performing. Accounting considers mostly past events, the only exceptions applies to certain account forecasts like the percentage of uncollectible accounts. While the rest of the business's functions relate mostly to current or future activities. Accounting provides the information that other business departments need to make decisions about their future activities.

income statement is prepared in order to show the profits and loss of a business. in order to prepare the income statement she should collect all the income and expenses of the product with the cost of production.