Marketing is a social & managerial process by which individuals or organizations obtain what they need through creating and exchanging value with others.

In a narrower business context, marketing involves building profitable, value-laden exchange relationships with customers.

Financial statements are written records of a business's financial situation.

They include standard reports like the balance sheet, income or profit and loss statements, and cash flow statement. 

The normal balance of liability account is Credit balance.

Normal balance is the side where the balance of the account is normally found. Asset accounts normally have debit balances, while liabilities and capital normally have credit balances.

 If the cost can never be zero, it has a fixed component. However, since it changes with the number of units produced, it also has a variable component. This is a mixed cost.

The balance sheet provides an overview of assets, liabilities, and stockholders' equity as a snapshot in time. The income statement primarily focuses on a company's revenues and expenses during a particular period.

Expenses means the cost incurred in or required for something. 

The macroeconomic perspective looks at the economy as a whole, focusing on goals like growth in the standard of living, unemployment, and inflation.

Cash account with normal balance is shown at the debit side of a trial balance.

Book keeping means the activity or occupation of keeping records of the financial affairs of a business.